However, before the start of the protest, three special police vehicles were parked in the courtyard of the police station.
Residents of Graanica have already gathered to protest the arrest of Dragia Milenkovi yesterday.
The so-called Kosovo police previously announced that the main road in Gracanica will be blocked while the Serb protest continues.
Hundreds of local in Serb-majority nothern Kosovo, led by medical workers, marched from North Mitrovica to Zvecan - where workers from the Trepca mine joined them - in protest against recent arrests of people suspected of attacks against Kosovo journalists, Serbian-language Kosovo media outlet Kossev reported.
The Higher Public Prosecutor's office in Kraljevo, central Serbia, ordered an investigation into three detained Kosovo policemen suspected of the illegal production, possession, carrying and trafficking of weapons and explosive materials..
The judge for the preliminary proceedings of the Higher Court in Kraljevo meanwhile ordered the detention of all three suspects.