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image copyrightReutersimage captionThe Iranian authorities have put out conflicting accounts of how the scientist was killed

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.

Brig-Gen Ali Fadavi told local media that the weapon, mounted in a pick-up truck, was able to fire at Fakhrizadeh without hitting his wife beside him. The claim could not be verified.

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

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Israel has neither confirmed nor denied responsibility.