A bomb explosion outside a college campus in Baghdad killed at least 22 people and injured dozens as a string of other blasts and rocket attacks left bloodshed around the city.

Most of the victims of te suicide bomber near the College of Business Administration and Economics were students. At least 31 people were injured.

The suicide attacker detonated a bomb-rigged belt near the main entrance to the college, where students were resuming mid-term exams after the two-day weekend in Iraq.

The school is located in a mostly Shiite district, but does not limit its enrollment to that group. It's part of Mustansiriyah University, which is located in another area of the city.

The wave of attacks came a day after Prime Minister Nouri al-Maliki praised the progress of an ongoing US-Iraqi security operation seeking to cripple militant factions and sectarian killings in the capital.

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