Scene of blast in Tehran
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Iran car explosion 'kills nuclear scientist' in Tehran

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

Iranian media sources named the casualty as Mostafa Ahmadi-Roshan, Reuters news agency reports.

BBC's Mohsen Asgari said that the blast is reported to have happened when a motor cyclist stuck a bomb to the side of his car - which he was travelling in along with two passengers.