Iraqi troops shot dead five protesters on Friday on their way to an anti-government rally west of Baghdad.
The soldiers started shooting after a group of protesters started throwing stones at an army checkpoint at the entrance to Fallujah.
Along with the five killed, 23 protesters were also wounded in the shooting.
The rally was part of weekly Friday protests which have continued since last month, sparked by the arrest of bodyguards assigned to Sunni Finance Minister Rafia al-Issawi. Police said one army vehicle had been set on fire by the protesters during the clashes in Fallujah.