Suicide bombers struck Thursday in Baghdad and a northern city, killing at least 19 people and wounding dozens more in a burst of violence only weeks before US combat troops are due to leave Iraqi cities. The attacks come a day after a car bomb exploded near a group of restaurants in a Shiite neighborhood of northwest Baghdad, killing 41 people and injuring more than 70. The deadliest blast Thursday occurred in Baghdad's southern district of Dora when a suicide bomber attacked an American foot patrol in an outdoor market. Police and hospital officials said 12 civilians were killed. The officials spoke on condition of anonymity because they were not supposed to release the information. U.S. military officials said they had an initial report of an attack in Dora but no word on U.S. casualties.