A satellite-controlled machine-gun with "artificial intelligence" was used to kill Iran's top nuclear scientist, a Revolutionary Guards commander says.

Mohsen Fakhrizadeh was shot dead in a convoy outside Tehran on 27 November.

On Sunday, Brig-Gen Ali Fadavi told local media the weapon, mounted in a pick-up truck, had been able to fire several rounds at Fakhrizadeh without hitting his wife beside him.

Iran has blamed Israel and an exiled opposition group for the attack.