At least 30 people have been killed, following an overnight attack by Islamic State militants in the Iraqi city of Tikrit.
More than 30 people have been killed in an overnight attack by Islamic State militants in the Iraqi city of Tikrit.
A police source told the BBC that the militants targeted officers in the central Zuhur district, and then opened fire randomly at civilians nearby.
At least two of them detonated suicide belts during clashes with police, which could still be heard after sunrise.
The assault comes as government forces continue an offensive to retake Mosul, the last major IS stronghold in Iraq.