Two men on a motorbike attached a magnetic bomb to the car of an Iranian professor working at a key nuclear facility, killing him and his driver.

The attack in Teheran bore a strong resemblance to earlier killings of scientists working on the Iranian nuclear programme. It is certain to amplify Teheran's claims of clandestine operations by Western powers and their allies to halt Iran's nuclear weapons advances.The blast killed Mostafa Ahmadi Roshan, a chemist and a director of the Natanz uranium enrichment facility in central Iran, state TV reported.State news agency Irna said Roshan had "organisational links" to Iran's nuclear agency, which suggests a direct role in key aspects of the programme.Natanz is Iran's main uranium enrichment site but officials claimed this week that they were expanding some operations to an underground site south of Tehran, where more advanced equipment would be used.(TimesLive)