BAGHDAD – A series of attacks Sunday against markets, shopping areas and auto repair shops in largely Shiite neighborhoods of Baghdad killed at least 45 people and wounded dozens more, police and medical officials said.

The first bombing hit the Amil neighborhood in western Baghdad around 7:30 a.m. in a crowded shopping district, killing at least six people and wounding 19 others.

Later, a car bomb exploded on a street filled with factories and car repair shops in Baya, a neighborhood in southwestern Baghdad, killing seven people and wounding 20, the police said.

Other bombings struck ­markets in the largely Shiite neighborhoods of Karada, Ghadir, Husseiniya, Sadr City, Sab al-Bor and Al Ameen al-Thaniya, killing 26 people and wounding more than 59.

A bomb exploded on a main road in Radhwaniya, a Sunni neighborhood in western Baghdad, killing two people and wounding eight, police said. Within hours, a bomb went off on the main road in Taji, in northern Baghdad, killing four people and wounding dozens.

There was no immediate claim of responsibility for the violence, but insurgents have frequently attacked civilians in an effort to undermine the ­Shiite-led government. More than 8,000 Iraqis have been killed so far this year, according to the United Nations.

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