The suspected architect of the 1996 Khobar Towers bombing in Saudi Arabia, which killed 19 American servicemen and wounded 372 more, was captured after a nearly two-decade manhunt, the Associated Press reported.
Ahmed al Mughassil was detained in Beirut after arriving there from Iran about two weeks ago, a Saudi official told the Associated Press on condition of anonymity.
Al-Mughassil was considered one of the FBI's most wanted terrorists since the 1996 truck bombing, which ripped open an eight-story dormitory for U.S. Air Force personnel in Saudi Arabia at the time.
Also known as Abu Omran, Al-Mughassil was one of 14 people named in a 2001 indictment of the bombing.
The FBI offered a $5 million reward for the 48-year-old suspect, who was believed to be a member of an armed wing of Saudi Hezbollah.
The group is believed to have driven a tanker with plastic explosives into the parking lot of the building, where it exploded.
A Saudi official told the AP that four others believed to have been involved in the bombing are currently in Iran.
U.S. officials declined to comment on reports of his capture.