Al-Qaeda Suspect Skips Out On FBI Probe
A man under investigation in a terrorism probe in New York and Colorado reportedly didn't show Saturday for a fourth day of questioning by the FBI.

Najibullah Zazi was expected to report to the Federal Building in Denver Saturday morning. But, a spokeswoman for his defense team told The Denver Post that there would be no meeting. According to the New York Post, Zazi and his attorney, Arthur Folsom, said they decided on a postponement "given the progress of negotiations so far."

In Washington, a senior U.S. intelligence official told the Associated Press Friday Zazi admitted to al-Qaeda ties, and played a crucial role in an intended U.S. terrorist attack. The official says it's not clear what his intended targets were, but that the plot was being conducted overseas.

According to law enforcement officials who spoke with ABC News, Zazi had been under investigation for almost a year. Initially, the CIA learned of Zazi's ties with al-Qaeda when he visited Pakistan, where operatives picked up "deeply troubling" conversations on government intercepts.

"Absolutely no way. It's a rumor," Folsom said Friday.

Zazi and his defense team continue to deny reports he's considering a plea deal on terrorism charges.

The 24-year-old airport shuttle driver was allowed to return to his Denver apartment after a third day of questioning Friday. He is not under arrest.

According to the New York Daily News, investigators spent several hours this week at a U-Haul in Queens, examining an attempt by some men in connection with the case to rent a large truck. The manager of the lot told the paper he never rented them a truck because they didn't have a valid credit card.

A U-Haul worker identified one of the men involved as Naiz Khan, an Afghan immigrant in Queens who knew Zazi, and who has also undergone FBI questioning.

Kahn denied any involvement Saturday, telling reporters "I've never been to that U-Haul."

U.S. Attorney General Eric Holder says the FBI is "working this case around the clock," though there is no imminent threat. Another official claims agents have been monitoring Zazi and four others in Colorado as part of a terrorism investigation. Also late Friday, FBI officials requested a meeting with Mohammed Zazi - the suspect's father - for reasons yet to be made public. Officials said Mohammed will comply.

Zazi's apartment - including his uncle and aunt's home in Denver - have been searched. So far, authorities have not revealed what they found.

Zazi was born in Afghanistan in 1985, moved to Pakistan when he was 7-years-old and emigrated to the United States in 1999.

Defense attorneys are expected to issue an official statement Saturday.