London: Iran has sentenced to death a person found guilty of providing information to Israel to help it assassinate several senior nuclear scientists, Tehran's prosecutor has said.

Dolatabadi did not identify the defendant on Tuesday, but Amnesty International said Ahmadreza Djalali, an Iranian doctor who studied and taught in Sweden, had been sentenced to death in Iran on espionage charges.

Pedestrians walk in downtown Tehran, Iran. Credit:AP

At least four scientists were killed between 2010 and 2012 in what Tehran said was a program of assassinations aimed at sabotaging its nuclear energy program. Iran hanged one man in 2012 over the killings, saying he had links to Israel.

On the latest conviction, Tehran prosecutor Abbas Jafari Dolatabadi told the judiciary's news agency: "The person had several meetings with [Israeli intelligence agency] Mossad and provided them with sensitive information about Iran's military and nuclear sites in return for money and residency in Sweden".