Four bombs exploded in Baghdad Sunday, killing at least 37 people. Twin car bombs exploded minutes apart in the busy market in the Shurta Rabia neighborhood, a mostly Shiite area of western Baghdad. The first blast went off midmorning in front of a kebab restaurant. Five minutes later, another car exploded nearby as rescuers were evacuating victims. Many women and children were among the casualties, police said. Shortly after noon, a suicide bomber blew himself up on a minibus near a courthouse in the mainly Shiite northwest Baghdad neighborhood of al-Utafiyah, killing at least eight people and wounding 11, officials said. About three hours later, a minibus rigged with explosives detonated on a busy street of electronics shops in the predominantly Shiite central Karradah district, killing 11 people and wounding 15, authorities said.