An Iranian scientist who says he was abducted and taken to the United States by the CIA returned to Tehran yesterday to a hero's welcome and claimed that he had been pressured into lying about his country's nuclear programme. Shahram Amiri said that he was on the hajj pilgrimage when he was seized at gunpoint in the city of Medina, drugged and taken to the US, where he says Israel was involved in his interrogation. In the US, officials were reported to have admitted that Mr Amiri was paid more than $5m (3.2m) by the CIA for information about Iran's nuclear ambitions. The offer of a large bribe is reportedly part of a special US programme to get Iranian nuclear scientists to defect. Americans wanted me to say that I defected to America of my own will, to use me for revealing some false information about Iran's nuclear work," Mr Amiri said at Tehran airport. "I was under intensive psychological pressure by [the] CIA... the main aim of this abduction was to stage a new political and psychological game against Iran." At his press conference at Tehran airport, Mr Amiri stressed that he had acted under compulsion. "Israeli agents were present at some of my interrogation sessions and I was threatened to be handed over to Israel if I refused to cooperate with Americans," he said. He says he was offered $50m to stay in the US.