Pro-Russian activists in Serbia joined nationalist protesters outside the presidency this week, in the latest indication of rising Russian influence.
Chanting "no surrender" and "treason", they threatened to riot if Serbia backed an EU plan to normalise relations with Kosovo.
President Alexander Vucic denounced the protesters as "anti-Serbian". บาคาร่า99 th
The government said it did not believe Moscow stoked the protests but the war has heightened tensions in Belgrade.
Death threats were made towards the president if he signed a deal on Kosovo and three men have been charged with calling for a violent change of Serbia's constitutional order.