The five men, escorted by US marshals, were sent to the US on two chartered aircraft from British air force base in Mildenhall, hours after the High Court in London rejected their final appeals against extradition last evening.
Authorities whisked Al-Masri, Khaled al-Fawwaz and Adel Abdul Bary to New York's Metropolitan Correctional Centre in Manhattan after their arrival and they would be produced in the District Court tomorrow, CNN reported.
The two other suspects extradited from Britain, Babar Ahmad and Talha Ahsan, who travelled on a separate plane, were to be produced before a judge in New Haven, Connecticut.
54-year-old Al-Masri, an Egyptian-born former imam, has been indicted in the US on charges like setting up an al-Qaeda-style militant training camp in Oregon. He is also being charged for the 1998 kidnapping of 16 westerners in Yemen.
Al-Masri is one of the highest profile radical Islamic figures in Britain, who has already been sentenced to seven years by a British court for inciting racial hatred at his north London mosque and other terrorism-related charges. (More)