At least three anti-government protesters have been shot dead in the southern city of Nassiriya after Iraqi forces opened fire to disperse a crowd.
More than 100 other people were wounded in the clashes in Nassiriya, officials added.
Since protests erupted in October, security forces have used live ammunition, tear gas and stun grenades against mostly young, unarmed protesters, killing more than 280 people.
Despite some attempts, Prime Minister Adel Abdul Mahdi's government has failed to address the demands for an overhaul of Iraq's sectarian political system.

Hurricane Melissa hits Cuba hours after devastating Jamaica
Trump says Gaza ceasefire holds, Israel has right to hit back if attacked
South Korea welcomes Trump with its highest award, a golden crown and ketchup
Ex-Philippines president Duterte appeals ICC jurisdiction ruling
Cyclone Montha lashes India's east coast; kills one
