A leading computer security firm has linked some of the software code in the powerful Flame virus to the Stuxnet cyber weapon, which is believed to have been used by the United States and Israel to attack Iran's nuclear program.

Eugene Kaspersky, chief executive of Moscow-based Kaspersky Lab, which uncovered Flame last month, said his researchers have since found that part of the Flame program code is nearly identical to code found in a 2009 version of Stuxnet.

The new research could bolster the belief of many security experts that Stuxnet was part of a massive US-led cyber program that is still active in the Middle East and perhaps other parts of the world.

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