Tehran: A nuclear physics professor at Tehran University was killed Tuesday by a bomb-rigged motorcycle parked outside his home in Iran's capital, state media reported.
Massoud Ali Mohammadi had just left his house on his way to work when the remote-controlled explosion went off, state-run Press TV said.
The blast shattered the windows of his home in northern Tehran's Qeytariyeh neighborhood and left the pavement outside smeared with blood and strewn with debris. The semiofficial ISNA news agency quoted Tehran prosecutor Abbas Jafari Dolatabadi as confirming the killing and saying no one has been arrested.
Neither report said whether the 50-year-old Mohammadi was connected to Iran's nuclear program, which the West suspects is aimed at developing a nuclear weapons capability.
Iran denies having any intention to produce weapons and insists its nuclear work only has peaceful aims, such as energy production.
A government news Web site, Borna, described Mohammadi as a senior nuclear scientist but gave no other details.
The Web site of Iran's state television declared the bombing a "terrorist act by counter revolutionaries and elements of arrogance," a reference to the United States. Security forces are investigating, the report said.
The United States and its allies in Europe have been pushing Iran to halt its uranium enrichment program, a technology that can be used to make fuel for power plants but which also offers a possible pathway to weapons development.
US Secretary of State Hillary Rodham Clinton said Monday that the Obama administration has concluded that the best way to pressure Iran to come clean on its nuclear ambitions is to impose sanctions aimed at the country's ruling elite.
"It is clear that there is a relatively small group of decision makers inside Iran," Clinton told reporters traveling with her on the first leg of a nine-day trip across the Pacific. "They are in both political and commercial relationships, and if we can create a sanctions track that targets those who actually make the decisions, we think that is a smarter way to do sanctions. But all that is yet to be decided upon."
