Police said six were detained on Wednesday evening, suspected of “preparing criminal acts against the constitutional order and security of Serbia” and “calling for violent change of the constitutional order,” AP reported.
At least one other university student was arrested earlier this week accused of preparing “an act of terrorism” based on his private conversations over a mobile phone. Hundreds on Thursday demonstrated against the arrest in Belgrade.
Protesting university students have called Saturday’s rally to press their demand for an early election after nearly eight months of almost daily anti-corruption demonstrations that have shaken the populist government of President Aleksandar Vucic.
Persistent protests started in November after a renovated rail station canopy collapsed that killed 16 people and which many blamed on rampant government corruption and negligence in state infrastructure projects. University students have been a key force behind the nationwide movement.
Vucic and his right-wing Serbian Progressive Party have refused the students’ demand for a snap vote, instead accusing the protesters of planning to spur violence at Saturday’s gathering.
Police alleged the detained group met last week in a hotel in the central town of Kraljevo to plan a violent change of government and attacks on police and pro-government media outlets. One of the suspects had a gun and ammunition, they said.
No other details were immediately available. Serbian media reported that those arrested include an opposition politician, veteran of the wars of the 1990s, and others.
Authorities made similar arrests back in March, ahead of what was the biggest ever anti-government protest in the Balkan country, which drew hundreds of thousands of people.
Vucic’s loyalists also set up a camp in a park outside his office which still stands. The otherwise peaceful gathering on March 15 came to an abrupt end when part of the crowd suddenly scattered in panic, triggering allegations that authorities used a sonic weapon against peaceful protesters, which they have denied.
Vucic, a former extreme nationalist, has become increasingly authoritarian since coming to power over a decade ago.