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FBI: Early probe results show 18 hijackers took part

FBI Director Robert Mueller  

WASHINGTON (CNN) -- With U.S. authorities saying they believe they have identified most of the hijackers responsible for Tuesday's terrorist attacks, investigators cast an international net for accomplices, believed to be "a significant number."

FBI Director Robert Mueller said a preliminary investigation indicated 18 hijackers were on the four planes -- five on each of the two planes that crashed into the World Trade Center, and four each on the planes that crashed into the Pentagon and in Pennsylvania.

The widening investigation stretched from the Canadian border to Florida, from Pennsylvania into Europe, as U.S. investigators enlisted the help of the international law enforcement community.

We would like to correct a report that appeared on CNN. Based on information from multiple law enforcement sources, CNN reported that Adnan Bukhari and Ameer Bukhari of Vero Beach Florida, were suspected to be two of the pilots who crashed planes into the World Trade Center. CNN later learned that Adnan Bukhari is still in Florida, where he was questioned by the FBI. We are sorry for the misinformation. A federal law enforcement source now tells CNN that Bukhari passed an FBI polygraph and is not considered a suspect. Through his attorney, Bukhari says that he is helping authorities. Ameer Bukhari died in a small plane crash last year.

U.S. Attorney General John Ashcroft said a team of 4,000 special agents at the FBI, joined by 3,000 support personnel, are working on the largest investigation in U.S. history.

Thousands perished when two hijacked commercial jets slammed into the World Trade Center's twin towers Tuesday morning, causing the 110-story towers to collapse in a terrifying cascade of cement, metal, glass and human bodies. A third jet slammed into the Pentagon, and a fourth crashed in rural Pennsylvania.

Among the developments:

-- Ashcroft said the pilots who hijacked the four planes were trained in the United States and had ground support.

-- U.S. Secretary of State Colin Powell named suspected terrorist mastermind Osama bin Laden as one of the primary suspects in the hijackings and crashes.

-- Investigators leading the probe of the Pennsylvania jetliner crash said they found debris six miles away from the crash site.

-- German police detained a male airport worker and brought in a woman for questioning in connection with the investigation.

US enlists ISPs in terrorist probe  

-- A man who had initially been linked by U.S. authorities to Tuesday's terrorist attacks was cooperating with the FBI after his attorney said his identification had been stolen.

No arrests have been made in connection with the deadly hijackings and no suspects have been identified by law enforcement authorities. An unspecified number of people have been detained for violations related to their immigration status.

About 40 of the people involved in the attacks have been accounted for, including those killed in the suicide attacks, but 10 remain at large, the Los Angeles Times reported Wednesday night on its Web site, citing an unidentified source with knowledge of the investigation.

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Some of those involved in the plot left suicide notes, but they are not believed to have been the hijackers, a government source told The Associated Press. It was unclear whether those who left the notes actually killed themselves.

Hijackers trained in U.S., Ashcroft says

Law enforcement sources said the hijackers had ties to the Middle East and bin Laden. Investigators said, however, that the probe is complicated by the fact that the hijackers died with their victims.

Only one of the downed jets' so-called "black boxes" has been found -- the flight data recorder from United Airlines Flight 93, which crashed in rural Pennsylvania.

Speaking to CNN Thursday, Ashcroft echoed President Bush in calling the disasters "acts of war," and vowed to find the perpetuators.

"I'm not able to identify any one responsible party for you today," Ashcroft said. "I would say that we are making progress in this investigation and following and developing an understanding of the kinds of associations that the individuals who perpetrated these acts of war had."

"Between three and six individuals on each of the hijacked airplanes were involved," Ashcroft said. "We know that they were trained and technically proficient, that they were trained in the United States to fly, some of them at least, to fly these airplanes, and they flew them with deadly accuracy."

Ashcroft said that as of Thursday morning the U.S. government had received 2,055 tips through a hot line number and more than 22,700 tips on a Web site dedicated to the investigation. The hot line number is 1-866-483-5137.

New debris site in Pennsylvania

Investigators searching the wreckage of United Flight 93 in western Pennsylvania on Thursday found the plane's flight data recorder, said FBI spokesman Bill Crowley. The recorder was being sent to the National Transportation Safety Board in Washington for analysis.

"We are hoping that it will have some information that is pertinent to what occurred in the plane prior to its crashing," Crowley said.

The NTSB said United Airlines Flight 93 was heading eastward when it crashed in Somerset County.

FBI officials leading the investigation said it could take weeks to recover everything from the crash site. Crowley said archaeologists have been brought in to search the impact crater, which has been covered by a layer of dust.

Authorities also said another debris site had been cordoned off six to eight miles away from the original crash debris site. But Crowley said the debris was "very light material such as paper and thin nylon -- things that in the air with the wind would easily blow."

People questioned in Florida, Boston

The FBI questioned individuals in Boston, Massachusetts -- where two of the hijacked flights originated -- and Florida, where some of the suspect hijackers had apparently lived and attended flight schools there.

In Boston, agents detained three men Wednesday for questioning, but released them later in the day.

In Florida, more than 400 federal agents were put on the investigation. Several men were being investigated as suspects in the terrorist attacks after searching homes and rental car documents and poring over flight school student records across the state.

bin laden
Bin Laden  

In Vero Beach, Florida, FBI agents searched four homes in three neighborhoods, according to witnesses.

A tenant in one of those houses, Adnan Bukhari, was cooperating with the federal agents, sources said.

Bukhari's brother, Ameer Bukhari, died in a small plane crash in Florida last year, according to a lawyer for the family.

Federal sources had initially identified the brothers as possible hijackers who had boarded one of the planes that originated in Boston. Their names had been tied to a car founded at an airport in Portland, Maine. But Bukhari's attorney said it appeared their identifications were stolen and said Bukhari had no role in the hijackings.

Germans detain two in Hamburg

In Germany, that nation's top prosecutor said three of the suspected hijackers were of Arab descent and are believed to have lived in Hamburg, where they were members of an alleged terrorist cell.

German police detained a male airport worker and brought in a woman for questioning in connection with the prosecutor's investigation into the attacks.

Multiple cells of terrorist groups participated in the operation and the hijackers had possible ties to countries that included Saudi Arabia and Egypt, The Associated Press reported, citing law enforcement officials who spoke on condition of anonymity.

Officials said authorities were gathering evidence that the terrorist cells may have had prior involvement in earlier plots against the United States, and may have been involved with Saudi exile Osama bin Laden. That includes the USS Cole bombing in Yemen and the foiled attack on U.S. soil during the millennium celebrations.

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