At least 68 people have died after Shi'ite militia forces opened fire on a Sunni mosque in the country's eastern Diyala province, a morgue official told Reuters.
The mass killing marks a setback for Prime Minister-designate Haider al-Abadi, from the majority Shi'ite community, who is seeking support from Sunnis and ethnic Kurds to take on the Islamic State insurgency that is threatening to tear Iraq apart.
Kurdish Peshmerga fighters have emerged victorious in the battle for Mosul Dam, but the question is - what will their next move be?
An ITV News team at Mosul Dam was with victorious Kurdish Peshmerga fighters at the complex earlier today.
ITV News joined a Kurdish unit fighting Islamist militants near Irbil and found them using tanks from the 1950s and short on ammunition.