BAGHDAD, Dec. 16 (Xinhua) -- At least 67 people were killed and 138 others wounded in violent attack in Iraq on Monday, including a massive attack on Shiite pilgrims in the capital city of Baghdad, police said.
At least 25 people were killed and 52 others injured when two car bombs went off simultaneously in the Rashid district in southern Baghdad, targeting Shiite pilgrims who were heading to the holy city of Karbala, some 110 km south of Baghdad, a police source told Xinhua on condition of anonymity.
No group has so far claimed responsibility for the deadly attack, but the al-Qaida front in Iraq, in most cases, was responsible for such bombings in the country.
Earlier in the day, a wave of violent attacks across the country killed 42 people and wounded 86 others, raising fears that terrorist groups and militia could drive the country to the verge of uncontrollable sectarian violence.
Monday's attacks came amid escalation of sectarian tension between the Sunni and Shiite communities, which has been at its highest level since the U.S. troops pulled out from the country at the end of 2011.
Iraq is witnessing its worst eruption of violence in recent years. According to the UN Assistance Mission for Iraq, 8,109 Iraqis were killed in the country from January to November this year.