A nuclear scientist who supervised a department at the Natanz uranium enrichment facility has been killed by a magnetic bomb placed on his car by two assailants in northern Tehran, Iranian media reported.<br /><br />The attack strongly resembles earlier killings of scientists working on the country's controversial nuclear programme.<br /><br />The bomb explosion killed Mostafa Ahmadi Roshan, a chemistry expert and a director of the Natanz facility in central Iran, the semi-official Fars news agency reported.<br /><br />Vice President Mohammad Reza Rahimi said Israeli agents were behind the attack, but said they cannot "prevent progress'' in what Iran claims are peaceful nuclear efforts.<br /><br />Al Jazeera's Dorsa Jabbari reports from Beirut, Lebanon.
