A university lecturer and nuclear scientist has been killed in a car explosion in north Tehran, reports say.

Mostafa Ahmadi-Roshan, an academic who also worked at the Natanz uranium enrichment facility, and another unidentified person were killed in the attack.

The blast happened after a motorcyclist stuck an apparent bomb to the car.

Several Iranian nuclear scientists have been assassinated in recent years, with Iran blaming Israel and the US. . .