Bombs planted along Iraq's roads and in a parked car killed at least three people in separate attacks Sunday, police said. Explosives hidden in a parked car went off around 11 a.m. near an Iraqi police patrol in Mosul, killing two civilian bystanders and wounding at least 15 people, according to police Brig. Mohammed al-Wagga. Five of those wounded were policemen, he said. The blast caused damage to retail shops in the Dawasa neighborhood, and about 15 cars were burned, al-Wagga said. Mosul lies about 360 kilometers northwest of Baghdad. Farther south in Tikrit, a bomb exploded inside a police station, killing one policeman and wounding two others, according to police and doctors at a nearby hospital. The officers had discovered the bomb on a downtown street and thought they had defused it, police said. Afterward, they brought the bomb to a station for further examination, and it exploded, they said. Tikrit is a mostly Sunni Muslim town 130 kilometers north of Baghdad. Meanwhile in the Iraqi capital, a roadside bomb exploded near a gas station as people were lining up to buy fuel at the start of the work week. Three civilians were wounded, police said. About half an hour earlier, another roadside bomb struck an American military patrol in a northeastern section of the Iraqi capital, police said. The US military confirmed the attack, saying an American vehicle was damaged and that there were no reports of casualties. Iraqi police also said US helicopter gunships bombed a truck in eastern Baghdad around 8 a.m. The truck had apparently been carrying a rocket launcher, they said. The US military had no immediate comment on the incident.