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Protesters have staged almost daily street demonstrations to demand accountability over the Nov. 1 crash at a railway station building in the northern city of Novi Sad. Fourteen people were killed and three others were severely injured after tons of concrete crashed without warning. later died while in hospital.

Many in Serbia believe the huge canopy collapsed because of . The Novi Sad railway station building was renovated twice in recent years in a deal with Chinese state companies.

The protests have posed a challenge for populist President Aleksandar Vucic. have been suspended for weeks with students camping inside their faculties.

Friday's blockade, which lasted for one hour, also stopped traffic across a key bridge over the Sava river.

against 13 people over the train station canopy collapse, including a government minister and several state officials. But over the probe's independence under the populist authorities.

Silent have been held at 11.52 a.m daily for the victims, the exact time when the canopy crashed. An attack on a group of drama students during one such protest had triggered the university blockades.

Hundreds held silent protests also on Friday at various locations across Serbia.

Vucic initially accused the students of receiving money from abroad. Pro-government media have alleged the protesters work for foreign intelligence services and have published personal data of some students.

But the president has also responded to the growing anti-corruption movement by offering cheap loans to students and claiming that their demands have been fulfilled.

Though Vucic has formally said he would back membership of the European Union, the Serbian strongman has faced accusations of diminishing democratic freedoms in the Balkan nation rather than advancing them during his past decade in power.