Syrian army soldiers take control of the village of Western Dumayna north of the rebel-held city of Qusayr on Monday, May 13. Syrian troops captured three villages in Homs province, allowing them to cut supply lines to rebels inside Qusayr town, a military officer told AFP. Tensions in Syria first flared in March 2011 during the onset of the Arab Spring, eventually escalating into a civil war that still rages. This gallery contains the most compelling images taken since the start of the conflict.
Syrian troops move into Dumayna on May 13.
Rebel fighters fire at government forces in the northern Syrian city of Aleppo on Sunday, May 12.
Smoke rises from an explosion in a Syrian village near the Israeli border on Tuesday, May 7.
Multiple explosions hit a Syrian village near the Israeli border on May 6.
A photo released by the Syrian Arab News Agency shows destruction from what is said was bomb attack in the Al-Hama area of Damascus on Sunday, May 5. According to the Syrian government, Israel launched an attack on a research center in the Damascus suburbs early Sunday.
People run for cover after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in Syria's Raqqa province, on May 3.
People walk past a damaged building and multiple destroyed cars at the site of an explosion in Damascus where at least 13 were killed on April 30.
Cleaning takes place following another explosion in an upscale Damascus neightborhood on Monday, April 29. Syrian Prime Minister Wael al-Halqi survived the bombing targeting his motorcade.
A smoke cloud rises from shelling on the the al-Turkman mountains in Syria's Latakia province on Thursday, April 25.
Searchers use a flashlight as they look for survivors among the rubble created by what activists say was a missile attack from the Syrian regime, in Raqqa province, Syria, on April 25.
A handout photograph from Syria's national news agency SANA shows damage and debris from a mortar attack in the suburb of Jarmana near Damascus, Syria, on Wednesday, April 24. The attack killed seven and wounded more than 25, according to activists and state media. No group claimed responsibility for the mortar fire, which SANA said hit a municipality office and a school building.
A Kurdish fighter from the "Popular Protection Units" (YPG) takes position inside a building in the majority-Kurdish Sheikh Maqsood area of Aleppo, on Apri. 21.
People walk past destroyed houses in the northern Syrian town of Azaz on Sunday, April 21.
Free Syrian Army fighters take positions prior to an offensive against government forces in the Khan al-Assal area, near Aleppo on Saturday, April 20.
Men inspect damage at a house destroyed in an airstrike in Aleppo on April 15.
Syrian and Kurdish rebel fighters walk in the Sheikh Maqsud district of Aleppo on April 14.
A Syrian boy holds an AK-47 assault rifle in the streets of Aleppo on Sunday, April 14.
A female rebel monitors the movement of Syrian government forces in Aleppo's Sheikh Maqsud neighborhood on April 11.
A rebel runs to avoid sniper fire from Syrian government forces in Aleppo on Thursday, April 11.
Syrian rebels observe the movement of Syrian government forces around Al-Kendi hospital in Aleppo on Wednesday, April 10.
Rescue teams and security forces check out the scene of a deadly car bomb explosion in Damascus on April 8.
The fighting has taken a toll on buildings in Aleppo's Saladin district, seen here on April 8.
A Syrian rebel runs for cover in Deir ez-Zor on April 2.
A rebel checks for snipers across the street toward the Citadel in Aleppo, Syria, on Saturday, March 30, in this photo taken by iReporter Lee Harper.
A Free Syrian fighter mourns the death of a friend in Aleppo on March 30, in this photo taken by iReporter Lee Harper.
A Syrian opposition fighter runs for cover from Syrian army snipers in Aleppo on Wednesday, March 27.
A Syrian girl covers her face to protect herself from fumes as a street covered with uncollected garbage is fumigated in Aleppo on Sunday, March 24.
A Syrian man and his family drive past damaged buildings in Maarat al-Numan, on Wednesday, March 20.
Syrians carry the body of a Syrian army soldier during a funeral ceremony in Idlib province on Tuesday, March 19.
Syrian rebels take position in Aleppo, the largest city in the country, on March 11.
Syrian men search for their relatives amongst the bodies of civilians executed and dumped in the Quweiq River on March 11.
A Free Syrian Army fighter looks back as smoke rises during fighting between rebel fighters and forces loyal to Syria's President Bashar al-Assad on the outskirts of Aleppo on Saturday, March 2.
Residents read Shaam News newspapers published by the Free Syrian Army in Aleppo on March 2.
A member of the Free Syrian Army reacts to the death of a comrade who was killed in fighting, at Bustan al Qasr cemetery in Aleppo on Friday, March 1.
A rebel fighter throws a home-made grenade at Syrian government forces in Aleppo on February 16.
A member of the Free Syrian Army stands with his weapon as he looks at a rainbow in Aleppo on February 16.
A Syrian woman looks through a bus window in Aleppo on February 14.
Free Syrian Army fighters walk through a dust-filled stairwell in Damascus on February 7.
A Syrian rebel gestures at comrades from inside a broken armored personnel carrier in Al-Yaqubia on February 6.
A rebel fighter throws a hand grenade inside a Syrian Army base in Damascus on February 3.
People stand in the dust of a building destroyed in an airstrike in Aleppo, Syria on February 3.
Free Syrian Army fighters run as they enter a Syrian Army base during heavy fighting in the Arabeen neighborhood of Damascus on February 3.
An unexploded mortar shell fired by the Syrian Army sits lodged in the ground in Damascus on January 25.
Fighters from Fateh al Sham unit of the Free Syrian Army fire on Syrian Army soldiers at a check point in Damascus on January 20.
A Free Syrian Army fighter walks between buildings damaged during Syrian Air Force strikes in Damascus on January 19.
A Syrian rebel fighter tries to locate a government jet fighter in Aleppo on January 18.
Syrian rebels launch a missile near the Abu Baker brigade in Albab on January 16.
A Syrian boy walks near rubbish next to tents at a refugee camp near the northern city of Azaz on the Syria-Turkey border, on January 8.
Syrians look for survivors amid the rubble of a building targeted by a missile in Aleppo on January 7.
A father reacts after hearing of a shelling by forces loyal to Syria's President Bashar al-Assad in Aleppo on January 3.
A patient smokes a cigarette at Dar Al-Ajaza psychiatric hospital in Aleppo on December 18, 2012. The psychiatric ward, housing around 60 patients, has lacked the means to function properly since fighting broke out there in July.
Syrians mourn a fallen rebel fighter at a rebel base in the al-Fardos area of Aleppo on December 8.
Members of Liwa (Brigade) Salahadin, a Kurdish military unit fighting alongside rebel fighters, monitor the area in the besieged district of Karmel al-Jabl in Aleppo on December 6.
A member of Liwa Salahadin aims at a regime fighter in the besieged district of Karmel al-Jabl in Aleppo on December 6.
Two young boys sit underneath a washline in a refugee camp on the border between Syria and Turkey near Azaz on December 5.
The bodies of three children, who were allegedly killed in a mortar shell attack that landed close to a bakery in Aleppo, on December 2, are laid out for identification by family members at a makeshift hospital at an undisclosed location of the city.
Smoke rises in the Hanano and Bustan al-Basha districts in Aleppo on December 1 as fighting continues through the night.
Damaged houses in Aleppo are seen after an airstrike on November 29.
A Syrian rebel mourns the death of a comrade in Maraat al-Numan on November 20.
Syrians protesters stand on Assad's portrait during an anti-regime demonstration in Aleppo on November 16.
A Syrian rebel takes cover during fighting against Syrian government forces in Aleppo on November 15.
Syrian opposition fighter Bazel Araj, 19, sleeps next to his pistol in Aleppo on November 11.
A rebel fighter fires at a Syrian government position in Aleppo on November 6.
A Syrian rebel leaps over debris left in the street while running across a "sniper alley" near the Salahudeen district in Aleppo on November 4.
Rebels hold their position in the midst of a battle on November 3 in Aleppo.
A man cries while being treated in a local hospital in a rebel-controlled area of Aleppo on October 31.
A man is treated for wounds after a government jet attacked the Karm al-Aser neighborhood in eastern Aleppo on October 31.
A Syrian rebel interrogates a handcuffed and blindfolded man suspected of being a pro-regime militiaman in Aleppo on October 26.
Smoke rises from a fuel station following a mortar attack as Syrian women walk on a rainy day in the Arqub neighborhood of Aleppo on October 25.
A Syrian rebel fires at an army position in the Karm al-Jabal district of Aleppo on October 22.
A wounded Syrian boy sits on the back of a truck carrying victims and wounded people to a hospital following an attack by regime forces in Aleppo on October 21.
A man lies on the ground after being shot by a sniper for a second time as he waits to be rescued by members of the Al-Baraa Bin Malek Battalion, part of the Free Syria Army's Al-Fatah brigade, in Aleppo on October 20.
Syrian army soldiers run for cover during clashes with rebel fighters at Karam al-Jabal neighborhood of Aleppo on October 20.
Smoke rises after a Syrian Air Force fighter jet fired missiles at the suburbs of the northern province of Idlib on October 16.
A Syrian opposition fighter stands near a post in Aleppo on October 11.
A Syrian man mourns the death of his father, who was killed during a government attack in Aleppo on October 10.
A rebel fighter is carried by his friends and laid on a gurney to be treated for gunshot wounds sustained during heavy battles with government forces in Aleppo on October 1.
Syrian rebels help a wounded comrade to an Aleppo hospital after he was injured in a Syrian army strike on September 18.
Free Syria Army fighters are reflected in a mirror they use to see a Syrian Army post only 50 meters away in Aleppo on September 16.
A Syrian man carrying grocery bags tries to dodge sniper fire as he runs through an alley near a checkpoint manned by the Free Syria Army in Aleppo on September 14.
A woman walks past a destroyed building in Aleppo on September 13.
Free Syrian Army fighters battle during street fighting against Syrian army soldiers in Aleppo on September 8.
A Syrian man wounded by shelling sits on a chair outside a closed shop in Aleppo on September 4.
A woman sits in her wheelchair next to her house, damaged by a Syrian air raid, near Homs on August 26.
Members of the Free Syrian Army clash with Syrian army soliders in Aleppo's Saif al-Dawla district on August 22.
A man mourns in front of a field hospital on August 21 in Aleppo.
Wounded civilians wait in a field hospital after an air strike on August 21 in Aleppo.
People pray during the funeral of a Free Syrian Army fighter, Amar Ali Amero, on August 21.
A man cries near the graves of his two children killed during a recent Syrian airstrike in Azaz on August 20.
A Syrian woman holds her dead baby as she screams upon seeing her husband's body being covered following an airstrike by regime forces on the town of Azaz on August 15.
A Syrian rebel runs in a street of Selehattin during an attack on the municipal building on July 23.
Syrian rebels hunt for snipers after attacking the municipality building in the city center of Selehattin on July 23.
Members of the Free Syrian Army's Mugaweer (commandos) Brigade pay their respects in a cemetery on May 12 in Qusayr.
Syrian rebels take position near Qusayr on May 10.
A Free Syrian Army member takes cover in underground caves in Sarmin on April 9.
Rebels prepare to engage government tanks that advanced into Saraquib on April 9.
Men say prayers during a ceremony in Binnish on April 9.
A young boy plays with a toy gun in Binnish on April 9.
A Free Syrian Army rebel mounts his horse in the Al-Shatouria village near the Turkish border in northwestern Syria on March 16, a year after the uprising began.
Syrian refugees walk across a field before crossing into Turkey on March 14.
A rebel takes position in Al-Qsair on January 27.
A protester in Homs throws a tear gas bomb back towards security forces, on December 27, 2011.
A man stands under a giant Syrian flag outside the Umayyad Mosque in Damascus on December 24, 2011.
A member of the Free Syrian Army looks out over a valley in the village of Ain al-Baida on December 15, 2011.
Members of the Free Syrian Army stand in an valley near the village of Ain al-Baida, close to the Turkish border, on December 15, 2011.
Displaced Syrian refugees walk through an orchard adjacent to Syria's northern border with Turkey on June 14, 2011, near Khirbet al-Jouz.
A Syrian man holds up a portrait of President Bashar al-Assad during a rally to show support for the president in Damascus on April 30, 2011.
Syrians rally to show their support for President Bashar al-Assad in Damascus on April 30, 2011.
A screen grab from YouTube shows thick smoke rising above as Syrian anti-government protesters demonstrate in Moaret Al-Noman on April 29, 2011.
A screen grab from YouTube shows Syrian anti-government protesters run for cover from tear gas fired by security forces in Damascus on April 29, 2011, during the "Day of Rage" demonstrations called by activists to put pressure on al-Assad.
Syrians wave their national flag and hold portraits of al-Assad during a rally to show their support for their leader in Damascus on March 29, 2011.
A woman sits by the hospital bed of a man allegedly injured when an armed group seized rooftops in Latakia on March 27, 2011, and opened fire at passers-by, citizens and security forces personnel according to official sources.
Syrian protesters chant slogans in support of al-Assad during a rally in Damascus on March 25, 2011.
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STORY HIGHLIGHTS
- NEW: U.N. Security Council will consider observer mission status Friday
- Thursday's death toll at 217, opposition group says
- Rebels control Iraq border crossing points, a senior Iraqi Army official says
- U.S. ambassador to U.N. says Russia, China are "isolated outliers"
(CNN) -- Amid fierce fighting, Syrian TV on Thursday showed video of President Bashar al-Assad, the first images broadcast of him since a deadly attack on top officials a day earlier.
The development came as rebels fought government forces in Damascus and its suburbs and made significant attacks on strategic border points, officials said.
Half a world away at U.N. headquarters in New York, Russia and China vetoed a new Security Council resolution aimed at halting the violence, prompting fierce criticism from the United States.
The video, showing al-Assad with newly named Defense Minister Gen. Fahd Jassem al-Freij, came amid growing speculation about al-Assad's whereabouts. Some reports suggested he might have left the capital.
There was nothing in the video to indicate immediately when it was taken, but Syrian TV reported that al-Freij had taken his oath in front of al-Assad.
What's next for Syria's president?
Major blow to al-Assad regime in attack
Syria at a tipping point?
Although al-Assad has not often appeared on television or in public events during the near 17-month crisis gripping his country, it is unusual for a leader not to address a nation in the wake of a major bombing, and as violence rages in the capital.
Wednesday's blast at a government building in Damascus killed three top officials, one of whom also was the president's brother-in-law.
What we need to know about Syria
At least 217 people were killed Thursday, including 40 in Damascus suburbs, 70 in Deir Ezzor and 33 in Idlib, the opposition Local Coordination Committees of Syria (LCC) said. The Damascus suburb of al-Qaboun was under heavy fire Thursday, according to an opposition activist.
Syrian TV shows new video of al-Assad
Rebel fighters fought Thursday for control of the country's borders with Turkey and Iraq, with success reported in the latter.
Two main crossing points, Albo Kamal and Al-Waleed, and seven additional security posts were in the hands of the rebels, a senior Iraqi Army official in Anbar province told CNN.
Iraqi security forces have increased their military and security presence at the border in Anbar as a precautionary measure, the official said.
The Free Syrian Army and other rebels were no longer in control of a compound they had seized at the Turkish border.
Forces attacked three to four border crossings, according to Col. Malek al-Kurdi, deputy head of the rebel Free Syrian Army.
"There was a battle at the border crossing, Bab al-Hawa, and government forces withdrew from the new gate to an older gate, al-Kurdi said.
Outnumbered rebels eventually were forced to withdraw from both gates, al-Kurdi said.
Videos posted to YouTube from inside a border station at the new gate showed a rebel tearing up a poster of al-Assad, while another rebel smashed portraits of the president and his father, Hafez al-Assad, who led the country until 2000.
Numerous world leaders slammed al-Assad's regime Thursday and condemned Russia and China for vetoing the Security Council resolution.
Russia, China veto sanctions on Syria
Western countries were pushing for a resolution that threatened new sanctions if government forces don't stop attacks against civilians. The resolution also called for renewing the 300-member U.N. observer mission for 45 days after it was suspended because of violence.
Russia and China, which have major trade deals with Syria, have said they want more balanced resolutions that call on all sides to halt the violence. Russia said Thursday's vote should never have taken place.
Russia had "very clearly and consistently explained" that it would not accept a resolution that "would open the path for pressure of sanctions and further to extend military involvement in Syrian domestic affairs," said Vitaly Churkin, Russia's ambassador to the United Nations.
Western diplomats "could have done something, anything, to promote dialogue" rather than "fan the flames of extremists," Churkin said. He described the draft resolution as "biased," saying it threatened sanctions exclusively at the Syrian government.
Susan Rice, U.S. ambassador to the United Nations, told CNN's "The Situation Room" that the United States will push other approaches to the conflict, including through the Friends of Syria Group.
"What Russia and China did today by vetoing a third resolution was really to slam the door, at least in the short term, on any effective action out of the U.N. Security Council," she said.
She called the two countries "isolated outliers" on the issue.
"History will judge them as having stood by a brutal dictator at the expense of his own people and at the expense of the will of the international community and the countries in the region," Rice told CNN.
The fate of the U.N. observer mission was unclear after the vetoes.
Competing drafts, sponsored by the United Kingdom and Pakistan, are expected to be considered by the U.N. Security Council. They highlight the simmering differences among members.
The UK mission said its resolution will be considered Friday morning. That draft measure extends the observer mission in Syria for a final period of 30 days.
Russia, which backs Pakistan's resolution, wants observers to stay in the country and promote dialogue. Western countries are concerned about the safety of observers and want one final deployment.
See the Syria crisis in photos
China's U.N. ambassador, Li Baodong, said his country is "highly concerned" about the violence, but Thursday's draft resolution was "seriously problematic," because it intended to pressure only one side in the conflict. It would not help resolve the issue "but derail the issue from the track of political segment," further aggravating turmoil, he argued.
Syria's U.N. ambassador, Bashar Jaafari, slammed the council for not issuing an official condemnation of Wednesday's bombing, although he noted that Kofi Annan, joint envoy to Syria for the United Nations and the Arab League, condemned it.
The lack of an official condemnation by the council indicates that talk of "supporting a peaceful solution in Syria is but a slogan," Jaafari argued.
He rejected a "misleading picture" of Syria as a tyrannical regime killing its people and said a solution should be found through a "political process that satisfies the Syrian people." All will participate to help "establish democracy" and "free elections," he insisted.
The al-Assad family has ruled Syria for more than 40 years.
Video: Fighting rages around Damascus
Residents trying to flee the Syrian violence have nowhere to go because clashes are raging in most of Damascus province, said Omar al-Dimashki, a spokesman for the Revolution Leadership Council of Damascus.
"It is surrounded by tanks, and anything that moves is currently being shelled, and rockets are falling on the homes," he said.
Sander van Hoorn, a journalist in Damascus with Dutch TV network NOS, a CNN affiliate, said, "One hour it can be quiet and the next hour all hell breaks loose."
A resident of the al-Qaboun neighborhood in Damascus said he fled with his wife and two sons after an explosion shook a house next door.
The man, who CNN is not identifying for security reasons, said his sister and her family joined them in Qamishli, and she described the government assault on al-Qaboun. "There were tanks, helicopters, armored personnel carriers and gunshots fell like rain. We were terrified," he quoted her as saying.
The Free Syrian Army warned them the neighborhood was "going to be a war zone."
Syria, which blames the violence on "armed terrorist groups," said it "repelled" some groups that attempted to enter Syria from Lebanon on Wednesday night.
The regime said Wednesday's bombing was carried out by people "implementing foreign plots."
The Syrian military issued a statement stressing its "resolution to decisively eliminating the criminal and murder gangs and chasing them out of their rotten hideouts wherever they are until clearing the homeland of their evils," state-run news agency SANA said.
Anyone who thinks that targeting leaders will "twist Syria's arms is 'deluded,'" the statement said, according to SANA.
Video: Syria government says it will fight back
The officials killed in the blast were the defense minister; the deputy defense minister, who is the president's brother-in-law; and al-Assad's security adviser and assistant vice president, state TV reported.
The FSA's al-Kurdi said the attack was coordinated by rebel brigades. But some other rebel commanders say it's unclear who was behind the attack.
Since the crisis began in March 2011, the United Nations estimates, more than 10,000 people have been killed in the violence; the opposition Local Coordination Committees of Syria estimates that more than 16,000 have died.
CNN cannot independently confirm reports of violence in the nation because the government restricts access by foreign journalists.
Attack threatens Syrian president's grip on power
CNN's Arwa Damon, Ivan Watson, Mohammed Tawfeeq; Richard Roth, Brian Walker and Salma Abdelaziz contributed to this report.