At least 55 bodies found in Iraq
Discovery includes a dozen men executed in Baghdad
The bodies of more than four dozen Iraqi men have been found.
Condoleezza Rice says Iraq is at the center of building Mideast peace.
Insurgents have killed about 400 Iraqis in the past two weeks.
BAGHDAD, Iraq (CNN) -- Iraqi police have found at least 55 corpses in six locations, including those from a dozen men executed Sunday, police said.
Eight of the Iraqi bodies with bound hands and blindfolds were in Baghdad's northeastern Al-Sha'ab area, police said, and each had sustained shots to the head.
Another four bodies of Iraqi males were in southeastern Baghdad's Ur neighborhood near a mosque.
Police said two men survived the shooting and were receiving treatment. The survivors reportedly told police that men dressed as members of the Iraqi army arrested them, took them to a remote area and shot them.
Nine bodies were found in Al-Mada'in, a police official said Monday, the same city south of Baghdad where some 50 bodies were discovered last month. (Full story)
Authorities also are investigating the recent killings of 34 others.
The International Committee of the Red Cross on Monday expressed its concern about the "high numbers of civilian casualties in Iraq." It noted that scores of Iraqis have died in car bombings in Baghdad and that fighting in western Iraq had forced hundreds, including women, children and the elderly, to flee their homes and seek refuge.
The Red Cross called on all those involved in the fighting to respect international humanitarian law.
On Saturday, the bodies of 10 Iraqi soldiers were discovered in the volatile western city of Ramadi, the Iraqi Defense Ministry said.
On Sunday, police found the bodies of 11 Iraqis in two trucks stopped on a road in Latifiya, about 15 miles (24 kilometers) south of Baghdad.
The men, laborers at a poultry farm, were shot to death, and four were beheaded, police said.
The truck drivers were arrested, police said.
In addition, the bodies of 13 men, apparently tortured and shot to death, were found in a garbage dump Sunday in Baghdad, police said.
The men were wearing only underwear and shirts, and those with beards had been shaved, morgue officials said.
Other developmentsA roadside bomb killed two Iraqis and wounded two other Iraqis and an American -- all security contractors working for a Western firm -- in eastern Baghdad on Monday night, Iraqi police said.A U.S. Senate report out Monday accuses top Russian politicians, including advisers to President Vladimir Putin, of engaging in illicit transactions with Iraq during the U.N. oil-for-food program. (Full story) Gunmen killed two Iraqi journalists working for a Kuwaiti newspaper Monday south of the capital, police said. The journalists' driver also was slain. The three worked for the Kuwaiti Al-Rai journal, authorities said.Five Iraqi soldiers were killed Monday when a roadside bomb exploded outside Baquba, north of Baghdad, police said. Seven soldiers and three civilians also were wounded.A mortar crashed into Baghdad's University of Mustancarya School of Engineering on Monday, killing a security guard and wounding two female students, eyewitnesses said. Also, an Iraqi civilian was killed and another wounded in a drive-by shooting Sunday in the northern city of Mosul, the Iraqi government said.The Iraqi government said Monday that it had captured a bomb maker in Mosul after earlier arresting a financier for the explosive expert's cell group. Iraqi security forces caught Salim Yussef Ghafif Huseyn in a raid last week. Huseyn works with a group associated with militant Abu Musab al-Zarqawi's network, the Iraqi government said. The financier, Abu Fateh, was detained in April, the government said.An aide to Iraq's top Shiite Muslim cleric was gunned down Sunday in Baghdad, police said. Sheikh Qasim al-Ghiri and a nephew died in a drive-by shooting. Al-Ghiri was a top aide to the Grand Ayatollah Ali al-Sistani, the spiritual leader of the Shiites and a major figure in Iraqi politics. No further details were immediately available.
CNN's Enes Dulami and Phil Hirschkorn contributed to this report.