A suicide bombing rattled through a mosque in Iraq's capital Baghdad late on Sunday, killing 28 people and wounding at least 40 others, a local police source said.

The suicide bomber went inside the Umm al-Qura mosque in western Baghdad and detonated himself on Sunday evening's prayer, the source told Xinhua on condition of anonymity.

Among the victims were children, the source said, adding that Iraqi security forces rushed to the scene and cordoned off nearby areas.

No one has so far claimed responsibility and investigations are underway, said the police official.

On the same day, a car bomb exploded in the Baya district in Baghdad's southwestern part, killing one civilian and wounding eight others, the source added.

Violence in Iraq has ebbed since its peak in 2006-2007 when sectarian clashes almost dragged the country into a civil war, but shootings and bombings still remain daily occurrences.