Albin Kurti, Kosovo's prime minister, has accused Serbia of "provoking a serious international conflict," with tensions between the two nations at an all-time high.
Two interior ministry offices in northern Kosovo were attacked on Saturday near border crossings blocked by local Serbs enraged by a restriction on automobiles with Serbian license plates entering the country, in the latest flashpoint.
The car registration office in Zubin Potok was set on fire, and two hand grenades were hurled at the civil registration office in Zvecan, though they did not go off, according to police.
There were no casualties mentioned.
Since the government ban went into effect on Monday, Serbs from Kosovo's north have blocked two major routes near the border.
Serbian drivers must now utilize temporary printed registration information that is only valid for 60 days.
The Kosovo government claims that this action is similar to those taken by Serbia against Kosovo drivers since the latter's declaration of independence from Serbia in 2008.
Protesters cheered Serb jet planes as they flew close to the Jarinje border crossing. Three helicopters had also flown in the area the day before.
Belgrade's media reported tanks and other military equipment on their way to the border, but the Serb army provided no information.
Restraint was urged by NATO's mission in Kosovo, where peacekeepers are maintaining a fragile peace.
Provocative conduct
"Serbia has made it clear that it wishes to militarize and escalate the situation. It is bringing Russian-made helicopters and jets near to the border," Kosovo Prime Minister Albin Kurti said at a press conference.
"Serbia is inciting a major international crisis."
Serbia, he claimed, is "encouraging and supporting" persons who want to attack Kosovo.
Kurti has asked Serbia to begin accepting Kosovo car license plates so that people and products can transit freely.
Kosovo should first evacuate police personnel dispatched to the north of the country to help implement the automobile plate restrictions, according to Serbian President Aleksandar Vucic.
In 2013, the two countries agreed to participate in a European Union-sponsored conversation to resolve outstanding difficulties, but little progress has been made.
Some 110 nations, including Australia, the United States, the United Kingdom, and other Western countries, recognize Kosovo's independence, although Russia, Serbia's longtime ally, and five EU member states do not.
