Baghdad, Jan 20 (IANS): Twenty people were killed and 67 others wounded in a series of bomb attacks in Iraq's capital Baghdad Monday, a police source said.

The deadliest attack occurred in Doura district in the southern part of Baghdad when two car bombs went off Monday afternoon, killing six people and wounding 15 others, the source told Xinhua on condition of anonymity.

Another car bomb detonated near a group of daily wage earners in New Baghdad district in the southeastern part of the capital, killing four people and wounding 15 others, the source said.

A car bomb ripped through a parking lot near the compound of Baghdad courts in Hurriyah district in the northern part of the capital, killing up to three people and wounding 12 others, while a fourth car bomb struck Baiyaa district in southern Baghdad and killed a civilian and wounded eight, the source added.

A sixth car bomb exploded in Shurta al-Rabia district in the southwestern part of Baghdad, killing three people and wounding nine others, he said.

Meanwhile, a roadside bomb went off in a popular market in Baghdad northern suburb of Rashdiyah, killing three people and wounding eight others, the source said.

Earlier, the source had put the toll at 14 killed and 55 wounded.

Iraq is witnessing its worst violence in recent years. According to the UN Assistance Mission for Iraq, a total of 8,868 Iraqis, including 7,818 civilians and civilian police personnel, were killed in 2013, the highest annual death toll for years.