The whereabouts of two other suspects also extradited from Britain, who traveled on a separate plane, were not immediately known.

Abu Hamza has been indicted in the United States on charges including setting up a training camp for militants in the state of Oregon and involvement in the taking of 16 hostages in Yemen in 1998.

He is expected to appear before a judge in New Haven, Connecticut, later Saturday.

Abu Hamza rose to prominence in the 1990s when he gave fiery sermons at the Finsbury Park mosque in north London, but has been in prison in Britain for eight years after being convicted of inciting hatred.

The other suspects are Khaled Al-Fawwaz, Syed Tahla Ahsan, Adel Abdul Bary and Babar Ahmad.