ISLAMABAD, Pakistan (AP) -- Police arrested a Shiite Muslim leader in connection with the assassination of a rival Sunni lawmaker amid a crackdown on several Islamic groups, officials said Sunday. Allama Sajid Naqvi, the leader of Tehreek-i-Islami Pakistan, was arrested late Saturday in Rawalpindi, a city neighboring the capital, Islamabad, Interior Ministry spokesman Abdur Rauf Chaudhry said. Naqvi was arrested in the killing of Maulana Azam Tariq, the leader of Millat-e-Islamia who was fatally shot Oct. 7 as he drove on the outskirts of Islamabad, Chaudhry said. His alleged role in that killing was not clear. On Saturday, President Gen....