Insurgents have killed at least 11 people in attacks across Iraq.

In the deadliest attack, a roadside bomb killed a police officer and his four children in Tikrit. Another roadside bomb killed at least one person in Kirkuk.

Iraqi firefighters try to extinguish burning vehicles at  site of suicide attack in Baghdad; car bomb hit two police vehicles in Al-Tahrir Square

In Baghdad, a suicide car bomber killed four people, included two police officers. Other attacks across the city wounded five U.S. soldiers. And in Baquba, a police officer was killed in a drive-by shooting.

Meanwhile, the U.S. military says soldiers killed two suspected members of al-Qaida in Iraq and detained 22 others during raids in Mosul and Ramadi.

The violence comes after Iraq's Independent Electoral Commission said it found no serious election fraud in Iraq's recent constitutional referendum. Official results have not yet been announced.

Some information for this report provided by AP and Reuters.