Iraqi security forces fired live rounds at protesters in Dhi Qar province, wounding five of them, a well-informed source said.
Clashes broke out between protesters and the security forces, as two security personnel were wounded, the source explained.
Protesters held demonstrations to demand enhanced services and job opportunities.
Iraqi authorities imposed a curfew in a number of cities.
This comes as sources said the situation in southern Iraq is getting out of control as angry protests are taking control of the provinces. Activists expressed concern the IRGC militia exploits the ongoing turmoil to spread terror and hamper oil transfers.