At least 20 people were killed Tuesday when an attacker blew up a vehicle in an Iraqi town south of Kirkuk.

Dozens more were wounded in the explosion, which hit a crowded market in the town of Tuz Khurmatu. The death toll is expected to rise, according to police and medical sources.

Tuz Khurmatu, Iraq
Tuz Khurmatu, Iraq

There was no immediate claim of responsibility for the attack.

Tuz Khurmatu, home to a mixed Kurdish, Arab and Turkmen population, was the site of violent clashes last month that left 11 people dead, according to Amnesty International figures, as Iraqi forces retook the Kurdish-held land after a controversial independence referendum.

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