Police sources told Reuters that at least 33 people were killed by a suicide bomber driving a car and gunmen disguised as police stormed a police headquarters in Kirkuk, northern Iraq.
Kirkuk, a religiously and ethnically mixed area of Arabs, Kurds and Turkman, is at the heart of a dispute over oil and land between Baghdad's central government and the autonomous Kurdistan enclave in the north.
The Sunday morning blast wounded at least 70 more people and police said there were still bodies trapped under the collapsed debris of buildings after the attack.
More top news
A mild day for most with plenty of misty low cloud.
Hollywood star Channing Tatum broke the news in a lengthy Facebook post as he paid tribute to Harvey Weinstein's accusers.
Scotland will become the first part of the UK to ban smacking if the bill goes through.