Iranian security has arrested several people in the hunt for the killers of a prominent nuclear scientist, its intelligence chief said today.
Intelligence Minister Heidar Moslehi said the arrests have given Iran's secret services "new clues" about the people involved in the deadly attacks, which it blames on Western intelligence agencies including MI6.
According to Iranian authorities, assailants on motorcycles attached magnetised bombs to the cars of two nuclear scientists as they were driving to work in Tehran on Monday, killing one and wounding the other.
Iran says the attacks are part of a covert campaign by Israel and the West to sabotage its nuclear programme which the US and its allies suspect is aimed at producing nuclear weapons - something Iran denies.
Officials say that campaign includes the abduction of Iranian scientists, the sale of faulty equipment and the planting of a destructive computer worm known as Stuxnet, which briefly brought Iran's uranium enrichment activity to a halt last month.
"A number of people were identified and arrested in connection with the two terrorist attacks," said Moslehi on state TV's website.
Moslehi accused MI6, the Israeli Mossad spy agency, and the CIA of being involved in the attacks.
He added that the assassination won't affect Iran's nuclear programme.
"The enemy must know that it won't get anywhere by such acts," he said.