At least seven people were killed and 49 others injured in a wave of car bomb attacks in the Iraqi capital of Tuesday, an interior ministry source said. The attacks occurred in the morning when five car bombs went off almost simultaneously in mainly Shiite districts in the eastern part of Baghdad, the source said on condition of anonymity. One of the car bombs detonated in Sadr City district in eastern Baghdad and killed a civilian and wounded nine others, the source said. Another one struck the nearby district of Jamila, leaving a civilian killed and ten others wounded, while three people were killed and ten others injured when another car ripped through Baladiyat district in eastern Baghdad, the source said. A car bomb went off at an intersection in Ur district in northeastern Baghdad, killing two people and wounding eight others. Separately, a car bomb exploded at a commercial area in Karrada district in southeast of capital, wounding 12 people, the source added. Iraq is witnessing some of 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 in years.