An Iranian nuclear scientist who has been missing since last June has defected to the US, a report says.ABC News said Shahram Amiri had been resettled in the US and was helping the CIA in its efforts to block Iran's nuclear programme.
Mr Amiri disappeared in Saudi Arabia while on a Muslim pilgrimage.
Iran accused the US of abducting him but Washington denied any knowledge of the scientist. The CIA has declined to comment on the latest report.
Mr Amiri worked as a researcher at Tehran's Malek Ashtar University, according to Iran's state-run Press TV channel.
However, some reports said he had also been employed by Iran's Atomic Energy Organisation, and had wanted to seek asylum abroad.
CIA operation?
The US and its Western allies suspect Iran of secretly developing nuclear weapons - a claim denied by Tehran.
According to ABC, the scientist has been extensively debriefed, and has helped to confirm US intelligence assessments about the Iranian nuclear programme.
His defection was apparently the result of a wider operation, under which the United States has been approaching Iranian scientists, sometimes through relatives living in America, to try to persuade them to defect.
By making this defection public, it appears the Americans are putting more psychological pressure on the Iranian authorities, says the BBC's Tehran correspondent Jon Leyne, who is in London.
