Members of Kosovo's opposition bloc are set to protest Saturday in Pristina against an EU-brokered agreement with Serbia.
Among their demands is a call for early elections.
The opposition, led by the nationalist Kosovo Albanian Vetevendosje movement, want to block an agreement designed to give more authority to majority Serb municipalities in Kosovo.
They also demand the resignation of Prime Minister Isa Mustafa and elections two years ahead of their regular time.
Albanians are a vast majority in Kosovo, a former Serbian province that went independent in 2008.
Opposition leaders said that they expect a massive turnout and promised a peaceful demonstration. The start was scheduled for 2 pm (1300 GMT).
Earlier protests against the agreement with Serbia - which have included a spate of tear gas attacks within the parliament - have frequently ended in street violence.
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