Anti-government protesters barred access to the offices of state broadcasters in Serbia's capital Belgrade and the second-largest city on Tuesday, keeping employees out and forcing some live programming off the air.

Several hundred students have blocked Serbia’s public television station building in Belgrade as tensions soar in the Balkan country days ahead of a planned large rally billed as an endgame in months

Several hundred university students blocked the entrance to Serbia’s public television station (RTS) in central Belgrade late Monday, returning the following day in an ongoing protest against what they allege is pro-government bias.

The anti-government protesters have said the blockade will continue for at least 22 hours. They accuse Serbia's public broadcaster of being biased towards President Aleksandar Vucic.

Serbia’s protests began in November after a train station canopy collapsed in the northern city of Novi Sad, killing 15. University students and opposition activists have accused Vucic and his Serbian Progressive Party of corruption and mismanagement that led to the tragedy.

University students have staged almost daily rallies since a concrete canopy at Novi Sad railway station collapsed in November, killing 15 people.