On Sunday, Kosovo had to close two border crossings with Serbia due to rising tensions over new border rules.
The police closed the Bernjak and Jarinje border crossings due to roadblocks by Serb protesters.
On Monday, a new law would require everyone entering Kosovo with a Serbian ID, to exchange it for a temporary identification during their stay.
The government also require ethnic Serbs with registration plates issued by Serbia, to change them for Kosovo license plates within two months.
In protest ethnic Serbs staged daily protests and blocked the traffic at the two border crossings.
Since Serbia does not acknowledge Kosovo's independence, tensions between the two countries are at an all-time high.
It is estimated that 50,000 ethnic Serbs living in the country's north use documents and license plates granted by Serbian authorities.
On Sunday, NATO said it would intervene if "stability is jeopardized." The alliance maintains peace with 3,770 troops on the ground in Kosovo.
