Three protesters were killed by tear gas canisters in Baghdad on Thursday, medical sources told AFP, the latest deaths from what human rights groups have slammed as a "gruesome" misuse of the weapon.
The United Nations had already documented 16 deaths from such military-grade canisters, which are up to 10 times heavier than regular tear gas grenades and can pierce skulls or lungs.
More than 330 people have been killed since protests erupted in Iraq on October 1.