In a communique dated January 5, 2011 and posted January 9 on its website (Kataibhizbollah.com), Kataeb Hizbullah ("Hizbulah Brigades"), an Iran-backed Shi'ite group operating in Iraq took responsibility for several recent attacks on U.S. bases in the country, and said that these attacks marked a new phase in the war against the American forces.
The communique states that on January 3, 2011 the group carried out coordinated rocket attacks on three U.S. bases in Baghdad – Camp Liberty, Camp Victory, and Camp Slayer – and simultaneously also on Contingency Operating Site Kalsu in Babil province.