He also admitted for the first time that a computer worm had affected centrifuges in Iran's uranium enrichment program.

Mahmoud Ahmadinejad and other Iranian officials vowed that the nuclear program would not be hampered by what they described as a campaign to sabotage it — whether by assassination or by the computer virus.

The two bomb attacks occurred when assailants on motorcycles attached magnetized bombs to the cars of two nuclear scientists as they drove to work in separate parts of the capital Monday morning. They detonated seconds later, killing one scientist, wounding another and wounding each of their wives, who were in the cars, Tehran's police chief said.

At least two other Iranian nuclear scientists have been killed in recent years, one of them in an attack similar to November 29's.

AP