FBI detains 7 in domestic terror probe

Sources: Targets may have included Sears Tower, FBI building

MIAMI, Florida (CNN) -- Seven people are in custody after a sweep by law enforcement authorities in connection with an alleged plot against targets that may have included the Sears Tower, officials told CNN on Thursday.
Officials said no weapons or bomb-making materials had been found in the searches in the Miami area by FBI and state and local law enforcement officials. The city is under no imminent threat, according to the FBI.
Law enforcement sources told CNN that the arrests disrupted what may have been the early stages of a domestic terrorist plot to attack the Sears Tower in Chicago, Illinois, the FBI building in Miami, and possibly other targets. (Watch details of the raids -- 2:53)
The 110-story Sears Tower is the world's third-tallest building and the tallest in North America.

Law enforcement sources told CNN that some of the suspects are members of a radical African-American Muslim group and that at least one had taken "an al Qaeda oath." They had carried out surveillance on the Sears Tower and FBI building in Miami, the sources said.
Federal law enforcement sources said five of the seven men were Americans, one was an illegal immigrant from Haiti whose visa had expired and the seventh was a resident alien.
Sources told CNN that the arrests culminated a monthslong undercover operation. The suspects believed they were dealing with an al Qaeda operative but the person was actually a government informant, the sources said.
Terror