A UN mission in the Democratic Republic of Congo has admitted to killing people during a gunfight with Uganda. As soldiers returned from leave, they opened fire at a border crossing, says the mission's head. Following anti-UN demonstrations in North Kivu province, three peacekeepers and 15 protesters were killed. On Saturday, Jean-Pierre Lacroix, the UN under-secretary-general for peace operations, visited Congo to discuss avoiding a recurrence of tragic events. As a result of perceived ineffectiveness, the UN mission in Congo is being criticized for not being able to stop the fighting in the volatile eastern region.