Demonstrators in Bangui, capital of the Central African Republic, have placed at least nine corpses in front of the UN’s mission following recent clashes.
On Sunday, UN peacekeepers began an operation to disarm vigilantes in a mainly Muslim neighbourhood of the city.
One peacekeeper was killed and several others were wounded on Tuesday.
Aid workers said they had treated dozens of people with gunshot wounds.
The CAR has been unstable for the past five years after rebels ousted the then-President Francois Bozize.