Four bombings and a shooting killed 10 people and wounded 36 others in Iraq on Wednesday, security and medical officials said.

In the deadliest attack, a car bomb exploded at about 7:45 pm (1645 GMT) in a market in Al-Muqdadiyah, 90 kilometres (55 miles) northeast of Baghdad in Diyala province, and a roadside bomb detonated soon afterwards, killing a total of seven people and wounding 25 others, a police colonel and a doctor said.

Another car bomb exploded about 7:30 pm (1630 GMT) in Baquba, the capital of Diyala, killing two people and wounding nine, the police colonel and a doctor from Baquba General Hospital said.

In Mosul in north Iraq, gunmen armed with automatic weapons attacked a police checkpoint, killing one policeman, police First Lieutenant Mohammed Khalaf and Dr Mahmud Haddad said.

And in Dohuk, the capital of an eponymous province in the autonomous Kurdistan region of north Iraq, a magnetic "sticky bomb" wounded two civilians, according to Birendar Hamid Sharif, the head of the Dohuk police media office.

Sharif said that a suspect was arrested in connection with the rare attack in normally peaceful Dohuk.

The latest violence brings the number of people killed in attacks in Iraq so far this month to at least 142, including 63 security force members, according to an AFP tally based on security and medical sources.

While violence has decreased from its peak in 2006 and 2007, attacks remain common across Iraq. There were attacks on 27 of the 31 days in July, and there has been at least one shooting or bombing every day this month.

Official figures put the number of people killed in attacks in July at 325, the highest monthly death toll since August 2010.