At least 78 people have been killed in a truck bomb blast near a Shia mosque in central Baghdad, Iraqi officials say.
The powerful explosion occurred in a car park near the al-Khilani mosque, destroying the outer wall and part of the building's interior.
Some 200 people were injured, and there are fears that the death toll will rise further.
The mosque's imam, Sheikh Saleh al-Haidari, said worshippers were hit as they were leaving afternoon prayers.
The explosion sent huge plumes of smoke billowing over the Iraqi capital.
It was one the most devastating attacks in Baghdad since US and Iraqi troops began a crackdown on militants in February.