Islamic State kills 24 in Baghdad blast, cuts road to Mosul

By Kareem Raheem and Ghazwan Hassan BAGHDAD/TIKRIT, Iraq (Reuters) - An Islamic State car bomb killed 24 people in a busy square in Baghdad's sprawling Sadr City district on Monday, and the militants cut a key road north from the capital to Mosul, their last major stronghold in the country. An online statement distributed by Amaq news agency, which supports Islamic State, said the ultra-hardline Sunni group had targeted a gathering of Shi'ite Muslims, whom it considers apostates. U.S.-backed Ira