Car bombs killed eight people in a Shi'ite slum and gunmen mounted a deadly ambush on a bus in a Sunni area of the capital as Iraq's sectarian violence showed no sign of easing. The coordinated bombing attack Monday in Baghdad's Sadr City began at midmorning when a car exploded near a repair shop. Minutes later, a suicide bomber blew up his vehicle in a crowd of curiosity-seekers who were milling around the first blast site, witnesses and police said. In addition to the dead, 41 people were wounded, most of them in the second blast, police said. Hours later, gunmen attacked a bus in the predominantly Sunni neighborhood of Amariyah in western Baghdad, killing the driver and six passengers, including a woman, police Capt. Jamil Hussein said. The attackers set fire to the bus before fleeing.