BAGHDAD (AP) — A series of bombings and attacks across Iraq killed at least 29 people Wednesday, authorities said, as politicians prepared to start negotiations to form a new government following parliamentary elections.

The deadliest attack happened when a suicide bomber rammed his explosives-laden car into a police checkpoint in Baghdad’s northern district of Kazimiyah, killing five police officers and four civilians, a police officer said. He added that the attack wounded 35.