Attackers in Baghdad killed nine people in three separate strikes in a 40-minute period on Saturday, police told CNN. Four mortar rounds slammed into Sarabadi market in the neighborhood of Kadhimiya in northwestern Baghdad, killing two and wounding 14 others. The incident took place around 10 a.m. (0600 GMT) A bomb exploded in Haraj market in central Baghdad at 10:30 a.m., killing six people and wounding 11. One person was killed and three were wounded when a car bomb detonated near the National Theatre in central Baghdad at 10:40 a.m. The Saturday blasts followed Friday violence that claimed at least one U.S. soldier. One U.S. soldier was killed while two others were unaccounted for Friday after they came under attack at a traffic checkpoint in Yusufiya, about 20 miles southwest of Baghdad. A quick reaction team was searching for the missing soldiers early Saturday morning. The team was dispatched to the scene after other troops nearby heard gunfire.