London A Briton released by Pakistan after more than a year in custody was arrested shortly after his plane landed Friday at London's Heathrow Airport, police said.
A handcuffed Rangzieb Ahmed was pulled off the plane by armed police who boarded it as soon as its doors opened.
Manchester police, who made the arrest, said Ahmed was being held under Britain's terrorism laws.
Ahmed was arrested Aug. 25, 2006, in Pakistan's North West Frontier Province for alleged links with al-Qaida. A U.S. human rights group said he had been tortured in custody.
Pakistani officials did not charge him, and a review board led by Supreme Court Justice Faqir Muhammad Khokhar ordered his release Aug. 31, the New York-based Human Rights Watch said.
Ahmed said he was interrogated several times by U.S. law enforcement personnel from unidentified agencies and by British security services, but he denied wrongdoing and involvement with al-Qaida, Human Rights Watch said.