The NATO-led international peacekeeping mission in Kosovo (KFOR) on Monday dispersed protesting Serbs using tear gas.
The protesters had gathered outside the Serb-dominated Zvecan municipality in northern Kosovo to bar newly elected Albanian mayors from entering three municipal buildings.
The protesters attempted to breach the police cordon in front of the town hall, the police said in a statement, adding that they used tear gas to disperse the crowd.
KFOR units also used tear gas and stun grenades to disperse the protesters, who did not retreat and responded with stones and sticks.
Many gunshots were heard in the region.
According to local media reports, some people were injured during the clashes but the figures could not be verified independently.
The injured are being treated at the health center in Zvecan, and those with more serious injuries were transported to the hospital in Kosovska Mitrovica.
A NATO helicopter is flying over the area.
Police and KFOR have fenced town halls and increased staff deployment in the area.
This is the second such protest staged in five days.