The group "Islamic State of Iraq," an Al-Qaeda affiliate, today posted a message on a militant website claiming responsibility for a spate of attacks in Iraq on Monday that killed over 100 people, reported the Associated Press.
The group described the assaults as a "blessed foray" kicking off their new "Breaking the Walls" campaign aimed at rebuilding tribal strength in a bid to retake Sunni-held areas, said AP.
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The message also included a call for a "new stage of jihad," said Reuters.
BBC News said security forces appeared to be a special target.
US troops withdrew from Iraq in December, and Monday's violence -- the deadliest seen in Iraq in over two years -- reflects a growing challenge for local forces trying to maintain security.