At least four people were killed and 14 more injured when a car bomb exploded outside a popular restaurant in the northern Iraqi city of Mosul on Wednesday , police officials there said . Meanwhile , the scene in Iraq 's restive Anbar province was chaotic Wednesday after Sunni tribes took over at least three police stations -- two in Ramadi and one in Falluja , police officials in Ramadi told CNN . At least one person was killed and 12 others were wounded in clashes between the Iraqi army and Sunni tribes in al-Karma , about 60 kilometers ( 37 miles ) west of Baghdad on Wednesday , police in Ramadi said . The latest violence came as the United Nations Assistance Mission for Iraq confirmed that last year was the deadliest for civilians in Iraq since 2008 . The total number of civilian casualties in 2013 , including civilian police , was 7,818 killed and 17,981 injured , according to UNAMI figures released Wednesday , compared with 6,787 dead and 20,178 injured in 2008 . `` This is a sad and terrible record which confirms once again the urgent need for the Iraqi authorities to address the roots of violence to curb this infernal circle , '' said the U.N. special representative for Iraq , Nickolay Mladenov . He urged Iraqi leaders to take steps to prevent `` terrorist groups '' from fueling sectarian tensions . Violence in the country has reached its worst levels since the height of the Iraq war , when sectarian fighting pushed the country to the brink of civil war . Anbar unrest . UNAMI said its 2013 figures do n't include casualties of the unrest in Sunni-dominated Anbar province in recent days . Police said Wednesday that dozens of fighters belonging to different Sunni tribes in Anbar province raided several police stations and confiscated weapons and vehicles from inside the buildings . They also released at least 100 detainees from inside a detention center within Falluja police headquarters , they said . On Tuesday , Iraqi Prime Minister Nuri al-Maliki said the army would leave cities in the province after tensions between the Iraqi army and Sunni tribes reached new heights . Clashes Monday in Ramadi and Falluja left at least five people dead and 20 injured . The fighting broke out as Iraqi security forces moved in to dismantle tents at two protest camps , just days after the arrest of a prominent Sunni lawmaker in a deadly raid on his Ramadi home . In response to the unrest , Shiite tribes in the Shiite-dominated Nasriya province organized a demonstration near the governor 's office in which they asked to march on Anbar and fight the tribes there .
Chaos reigns in Anbar province as Sunnis seize police stations ; one death reported . The U.S. military said it was investigating the reports of a massacre at an Iraqi army checkpoint near Falluja. The United Nations says 2013 was the deadliest year for Iraqi civilians since 2008 . U.N. representative for Iraq urges Iraqi leaders to take steps to curb violence .