A suicide car bomber struck an Iraqi military checkpoint at a joint operations center north of Baghdad on Sunday, killing two soldiers and one civilian, officials said. Thirteen others were wounded in the attack, part of violence that killed at least three others in the country. The suicide attack occurred at 9:45 a.m. (0545 GMT) in Tikrit, Saddam Hussein's hometown 130 kilometers (80 miles) north of Baghdad, Army Capt. Muhanad Ahmed said. The civilian killed was an employee who manned the security checkpoint. The wounded included eight soldiers and five civilians, Ahmed said. Civilians were near the checkpoint because construction workers were fixing the gate. Elsewhere, gunmen killed two Iraqi police officers in western Baghdad as they headed to work Sunday morning. The policemen were on their way to Diyala Bridge police station in the capital when the shooting occurred, Iraqi army Capt. Usama Adnan said. A second band of gunmen killed an electrical engineer who was on his way to work at the Dora oil refinery in southern Baghdad, said Dr. Muhanad Jawad of the capital's Al-Yarmouk hospital. At least 1,112 people have been killed in insurgent violence since Prime Minister Ibrahim al-Jaafari's government was announced April 28, according to a report of The Associated Press.