Iran has accused the U.S. another attack by a computer virus Stuxnet

A power plant and other industries in southern Iran have been targeted by the Stuxnet computer worm, an Iranian civil defence official says.

But the cyber attack has been successfully rebuffed and prevented from spreading, Iranian media report.
Iran's nuclear enrichment efforts were hit hard in 2010 by the Stuxnet worm, which was also blamed for problems at industrial plants and factories, BBC reports.