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.