A car bomb at a crowded market in northern Baghdad has killed at least 64 people and wounded 87 others, Iraqi police and medical sources say.

It happened at the Shia district of Sadr City during the morning rush hour.

So-called Islamic State (IS) claimed it was behind the attack, which it said had targeted Shia militiamen.

The Sunni group, which controls swathes of northern and western Iraq, has frequently targeted Shia, whom it considers heretics.

Many of the victims included women and children, officials said. Several of the injured were said to be in critical condition.

The blast damaged nearby buildings and other vehicles.

Commercial areas are a regular target for IS. In February, at least 70 people were killed in a twin bombing at a busy market in Sadr City, the bloodiest attack in Baghdad in many months.

Iraqi government forces, backed by US-led coalition air strikes and Shia-dominated paramilitary forces, have regained some territory seized by IS in 2014, but have been unable to prevent bomb attacks in the capital.