AP - Pakistani police arrested a group of Islamist militants plotting to kill the prime minister in a gun and suicide bomb attack at his house, officials said Thursday. The seven men also are accused of targeting other government leaders for assassination.   Militants in Pakistan have frequently attacked government officials, security officers and political leaders as part of a campaign to destabilize the U.S.-allied government and take over the state. Opposition leader Benazir Bhutto was killed in a gun-and-bomb attack near Islamabad in 2007.   The conspiracy against Prime Minister Yousuf Raza Gilani was nearly complete, police officials said.