Iraqi officials say a suicide bomber has killed at least 32 people attending a funeral north of Baghdad.

They say about 60 other people were wounded in the blast inside a tent where mourners had gathered in Khalis, a Shi'ite enclave.

In Baghdad, loud explosions rocked the Green Zone, which houses Iraqi government buildings and the U.S. and British embassies. Smoke was seen rising over the area but there were no reports of injuries.

Earlier Monday, a suicide car bomber killed four people at a police checkpoint in western Baghdad. In al-Anbar province, a tanker truck exploded near a restaurant outside Ramadi, killing at least four people.

Elsewhere, four insurgents were killed when they attacked a police station in the northern city of Mosul.

In another development, the U.S. military says American and Iraqi forces killed eight militants late Sunday in a joint raid on a Shi'ite district of Baghdad. One Iraqi soldier also was killed.

The U.S. military denied local media reports that during the operation, American troops entered a mosque and an office belonging to allies of radical Shi'ite cleric Moqtada al-Sadr.

Some information for this report was provided by AFP, AP and Reuters.