“The loose-knit hacking collective LulzSec, which is responsible for numerous recent attacks on several big-name games developers including Sony and Nintendo, yesterday released two statements on its website claiming responsibility for successful cyber attacks against the U.S. Senate and Bethesda Softworks.”

Source: Cyber attack: LulzSec go for twofer hacking U.S. Senate and Bethesda Softworks – International Business Times