NATO has urged Kosovo on Saturday to reduce tensions, a day after the government in Pristina forcibly entered official buildings. In recent days, there have been clashes between Kosovar police and protesters from the Serb minority in the border town of Zvecan.

The United States, France, Italy, Germany and Britain have also called for "restraint" and avoidance of "inflammatory rhetoric" Russia blames the West for the escalation, and Serbia has raised the alert level of its Armed Forces on the border.