Hundreds of student protesters have blocked the entrance to Serbia's state broadcaster in Belgrade, as they blame the public TV station for coverage that favours President Aleksandar Vučić's government.
A similar blockade was organised in the country's second-largest city, Novi Sad.
University students in Serbia are behind almost daily rallies that started after a concrete canopy crashed down in November at a railway station in Novi Sad, killing 16 people.
Many in Serbia believe that the huge concrete construction fell down because of poor renovation work fuelled by government corruption.