Slovenia on Friday allowed a former prime minister of Kosovo to return home, after he was held there on an Interpol warrant issued by Serbia, his party said.

Ramush Haradinaj was "expected to arrive in Kosovo during the day," the opposition Alliance for the Future of Kosovo (AAK) said.

Kosovo lawmakers voted a resolution Thursday demanding Slovenia unconditionally return a former Kosovo prime minister held there on an Interpol warrant issued by Serbia.

The resolution said Kosovo's government and president "urgently require the Slovenian authorities to immediately return (his) diplomatic passport and unconditionally allow the return" of Ramush Haradinaj to Kosovo.

Former Kosovo prime minister Ramush Haradinaj, acquitted by a U.N. court of war crimes during the 1990s Kosovo conflict, said he was detained Wednesday at Ljubljana airport on an Interpol warrant issued by Serbia.

"I was in transit, the checking of my documents was lasting for a long time and when I asked what was going on ... I was told that there was an arrest warrant that was still valid," Haradinaj told AFP over the phone.

Some 1,000 Kosovo Albanians, mostly veterans of the 1990s war with Serbia, protested Wednesday against the creation of a special court that would handle war crimes allegedly committed by former ethnic Albanian guerrillas.

"History shows that there are no crimes when a nation fights for freedom," Xhavit Jashari, a veteran leader, told the protesters who gathered in front of the government and parliament buildings in the capital Pristina.

One person was injured Tuesday as a helicopter of the EU police and justice mission (EULEX) in Kosovo crashed at Pristina international airport, officials said.

"Around 3:00 pm (1300 GMT) an accident occurred with a EULEX helicopter on the runway that was flying for training purposes," the airport said in a statement. 

Kosovo's Prime Minister Isa Mustafa said Tuesday his country would help prevent a regional escalation of the recent unrest in neighboring Macedonia that left 22 people dead and dozens of homes destroyed.

"Kosovo is interested in a tight cooperation between its police and the police of Macedonia in clearing up the circumstances that led to the unacceptable and unjustifiable situation," he told journalists during an official visit to Slovenia.

Kosovo lawmakers on Thursday adopted legislation banning citizens from fighting in foreign conflicts in a bid to prevent young people from joining jihadist groups in Syria and Iraq.

The legislation provides for up to 15 years behind bars for anyone violating the ban on taking part in armed conflicts abroad.

Kosovo has indicted seven ethnic Albanians on terrorism charges over alleged plans to take up arms with the Islamic State group or recruit fighters for the insurgents, officials said Monday.

Five of the indicted "agreed to go to the war in Syria and join the group of Albanians who fight on the side of the terrorist organization ISIL", known also as IS, the Kosovo prosecutor's office said in a statement.

Kosovo marked a somber seventh anniversary of independence from Serbia Tuesday as the mainly ethnic Albanian territory grapples with an exodus triggered by deep economic malaise.

Not a single Kosovo flag was flying on the main street in Pristina, with a special parliamentary session the only official event planned to celebrate the territory's unilateral breakaway from Belgrade in 2008.

Kovoso's Interior Minister Skender Hyseni on Thursday urged the European Union to expel thousands of Kosovan nationals, who have quit their homeland in search of a better life in EU countries.

Speaking after talks with his Austrian counterpart Johanna Mikl-Leitner in Vienna,, Hyseni said: "We've always been told that the vast majority of the illegal migrants have no status rights and will be sent back. I hope that happens quickly."