An Al-Qaeda linked groups threatened to attack Rome to punish Italy for supporting the United States, a Web statement said. It also praised the bombings in London. The statement did not appear on Web sites normally used by Islamist militants loyal to al Qaeda leader Osama bin Laden. "We warn Rome, the capital of infidels, that the lions of Jihad in Europe are ready to launch strong strikes against the collaborating government with the crusaders, the Americans, the enemies of God, the Prophet and Muslims," it said.