Security forces used live fire against protesters near Shuhada Bridge in central Baghdad. Gunfire was used against demonstrators in Basra, the main source of Iraq's oil wealth, who had staged a days-long sit-in.
Eyewitnesses said several demonstrators were killed late on Friday when unidentified men attacked and seized a building near the main protest camp in Iraq's capital.
Several rockets slammed into an Iraqi military complex that hosts US forces next to Baghdad International Airport on Monday, wounding six Iraqi troops, the military said.
The protests represent a second phase of a week-long movement in early October that ended with more than 150 people dead. Rallies had been set to resume on Friday, with a range of actors from Iraq's highest Shiite authority to the United Nations urging restraint.
More than 30 people were taken to hospital with breathing difficulties
The death toll from protests this month has soared to 220, including dozens killed since Friday as they torched government buildings or offices.
Eleven people were killed during protests overnight in two southern Iraqi cities, including a policeman, police and medical sources said on Thursday, raising the death toll to 18 since anti-government protests
An indefinite curfew came into effect early on Thursday in Iraq's capital after two days of chaotic protests across the country that descended into violence and left nine dead.
Clashes between police and protesters killed five people in Baghdad on Saturday in a resumption of anti-government unrest
Members of rival Iraqi biker gangs, clad in studded leather and black berets, burst out of their semi-circles to break dance, their tattoo-covered arms waving neon glowsticks. The Mongols Motorcycle Club dance circle was one of several at the Riot Gear Summer Rush event, a car show and concert held at a sports stadium in the heart of Baghdad.