Security forces meanwhile foiled an attack on the local council of the western town of Rawah by five would-be suicide bombers disguised in police uniforms, said Muthana Ismail, head of the local security committee.
Ismail said two attackers were shot while the rest blew up themselves up outside. Two police officers and an official were killed, while 20 people were wounded, he said.
Rawha is about 330 kilometres northwest of Baghdad.
There was no immediate claim of responsibility for Sunday's attacks, though car bombings and gun assaults are favourite tactics of al-Qaeda's local branch. It frequently targets Shiites, whom it considers heretics, and those seen as closely allied to the Shiite-led government in Baghdad.
Hospital officials confirmed the casualty figures for all attacks. All officials spoke on condition of anonymity because they were not authorised to speak to journalists.
- AP