Demonstrators have devastated the headquarters of the UN mission in eastern Democratic Republic of the Congo.
They forced their way into the building in the city of Goma on Monday and destroyed or stole furniture, eyewitnesses reported to the German Press Agency.
Security forces responded with tear gas and gunfire.
Police in North Kivu province said the attackers were criminals who had taken advantage of the demonstration against the UN peacekeeping presence in Congo.
Civil society organizations and President Félix Tshisekedi's party called for the demonstration in Goma.
The background to this is a statement by Congolese Senate President Modeste Bahati in mid-July.
He had asked the UN mission Monusco to leave the Congo.
130 armed groups
The UN stabilization mission has been stationed in north-eastern Congo for more than 20 years.
According to the United States, around 130 different armed groups are said to be active in the Central African country;
many of them are concerned with controlling the country's valuable natural resources.
With around 90 million inhabitants, Congo is rich in natural resources such as copper, cobalt, gold and diamonds.