Serbia's foreign minister said Tuesday the government was "not happy" with Israel's decision to recognise Kosovo, a former Serbian province whose statehood Belgrade denies and has waged a diplomatic battle to de-legitimise.

Former war foes Serbia and Kosovo will restart talks in Brussels on Thursday to normalise their strained relationship after a long stalemate, though the road to settling their many disputes is paved with stumbling blocks.

Kosovo and Serbia must put aside extremist rhetoric and recommit to peace, the White House said Monday, 20 years after the end of a NATO bombing campaign against a Serbian crackdown.

Serbia and Kosovo have agreed at a summit in Berlin to resume talks, after the leaders of France and Germany warned the bitter foes that resolving their dispute was crucial to future ties with the European Union.

A deal between Serbia and Kosovo is possible this year but cannot include border changes, Kosovo's premier Ramush Haradinaj told AFP in an interview, warning that territory swaps could revive old demons in the war-scarred Balkans.

Kosovo on Friday passed laws to build its own army, asserting its statehood in a move that inflames tensions with Serbia, which denies the independence of its former province.

Kosovo, Europe's youngest state, turns nine on Friday, but 24-year-old Nazim Ahmeti is in no mood to celebrate.

An explosive device was thrown and automatic weapons were fired at a sports hall in northern Kosovo on Sunday some 12 hours before Serbian Prime Minister Aleksandar Vucic was due to visit, Serbian media reported, adding that there were no casualties.

The blast occurred outside a hall at Zubin Potok at around 3:00 a.m. (0100 GMT) as workers were setting up a stage where Vucic was to make a speech, the state-run news agency Tanjug reported.

Prosecutors in Kosovo have pressed terror charges against three alleged Islamic State group supporters, including two who went to the Syrian frontline to wage jihad, an official said Thursday.

The pair allegedly fought with the extremist group in Syria last year while the third "was propagating and recruiting people through Facebook to join IS," Liridona Kozmaqi, spokeswoman of the chief prosecutor's office, told AFP.

Scenes of violence at Kosovo's parliament during which opposition MPs released tear gas to prevent the election of a new president were "extremely worrying", the European Union said on Saturday.

The protests took place on Friday as the parliament gathered to elect a new head of state in an election marred by violence both inside the chamber and on the streets of Pristina.