From Sky News:

Iran has blamed Israel for the murder of a nuclear scientist who was killed by a bomb that had been attached to his car.

Mostafa Ahmadi Roshan, 32, died after two unidentified men on a motorbike fastened a magnetic bomb to his vehicle outside a university in east Tehran.

The dead scientist worked at Iran’s uranium enrichment facility in Natanz, and officials were quick to put the blame on Israel.

“The responsibility of this explosion falls on the Zionist regime,” said provincial governor Safar Bratloo.

“The method of this terrorist action is similar to previous actions that targeted Iran’s nuclear scientists.”

Vice president Mohammad Reza Rahimi also pointed the finger at “those who claim to be combatting terrorism” – a thinly-veiled accusation of American involvement.

“They should know that Iranian scientists are more determined than ever in striding towards Iran’s progress,” he said.

Mr Roshan is the fourth Iranian scientist to have been killed by a car bomb in the capital since early 2010.