'Iran tortured me into confessing to be an Israeli spy'

A once-successful Iranian businessman says he is lucky to be alive after being tortured by the Iranian authorities into a false confession of spying for Israel and assassinating Iranian nuclear scientists - a crime punishable by hanging.

The story of Mazyar Ebrahimi, who now lives abroad, also sheds a light on a bitter rivalry between Iran's intelligence agencies, as BBC Persian's Jiyar Gol reports.