DETROIT -- The manhunt for a man with reported ties to last week's terrorist attacks intensified Wednesday as federal investigators uncovered new clues.

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The FBI said that Nabil Al-Marabh, 34, (pictured, left) was last seen in Michigan Monday at about 1:40 p.m. and that he could still be in the state. He was spotted at a Secretary of State office getting a duplicate driver's license. Investigators told Local First News that his passport was discovered in a southwest Detroit home.

Agents raided a home on Norman Street Tuesday where Al-Marabh once lived and discovered that three men were now living there. Those men were arrested and face a variety of fraud charges including conspiracy to possess false documents after agents discovered what they said were fake visas, immigration forms and Social Security and immigration identification cards.

Karim Koubriti, Ahmed Hannan and Farouk Ali-Haimoud remain in federal custody and face a detention hearing in federal court in downtown Detroit on Friday.

Investigators said that they have linked Al-Marabh to two terrorists on planes that were hijacked and crashed into the World Trade Center and the Pentagon in suicide bombings.

The FBI has also linked Al-Marabh to a third suspected terrorist, turned informant, who has accused him of being an associate of Osama bin Laden, the reported mastermind behind the Sept. 11 attacks.

The informant himself is a suspect in the failed "millennium bombing" plot last year to kill American tourists in Jordan.

Al-Marabh told his former landlord that he was a truck driver, and he is licensed in Michigan to haul hazardous waste, according to Local First News.

The suspect also has ties to the Boston area, where one of the four planes hijacked last week departed from.

Stay tuned to Local First News and to ClickOnDetroit.com for updates to this developing story.