A string of bombings killed 10 people Monday in the Baghdad area and another US Marine died in fighting west of the capital, after a massive car bomb attack in a Shi'ite area market delivered the first major blow to the US-led security crackdown. Five people died and 11 were wounded when a bomb exploded on a public bus headed for the mostly Shi'ite area of Karradah in central Baghdad, police reported. A roadside bomb killed three policemen in the Shi'ite area of Zafraniyah in southeastern Baghdad, wounding two other people, including a civilian, police said. In Mahmoudiya, 30 kilometers south of the capital, a car bomb went off among auto repair shops, killing two and wounding two, police said. Mahmoudiya is mostly Shi'ite with Sunnis living in villages around the community and has long been a flashpoint for sectarian violence. The scattered blasts, which occurred during the morning rush hour, occurred one day after a massive car bomb attack in an outdoor market, delivering the first major blow against a US-led security clampdown in Baghdad. Police said at least 63 people died in the attack in the mostly Shi'ite area of New Baghdad. Scores were injured as extremists sent a bloody calling card to officials boasting that militant factions were on the run.