Suicide bombers struck a police headquarters, an army base and a hospital around Mosul on Sunday, killing 33 people in a setback to efforts to rebuild the northwestern city's police force that was riven by intimidation from insurgents seven months ago. At least 14 people were killed in attacks elsewhere in Iraq, including a U.S. soldier whose convoy was hit by a roadside bomb in Baghdad and six Iraqi soldiers who were gunned down outside their base north of the capital.