Twelve people have been arrested in Serbia in connection with a roof collapse early this month at a train station in the northern city of Novi Sad that killed 15 people and severely injured two.

The High Prosecutors Office in the Serbian city of Novi Sad said on Thursday that 11 people were arrested in connection with the collapse of a railway station roof earlier this month that has left 15 people dead.

Anti-government protesters sought to block a courthouse in Novi Sad, where the roof collapse at the station on Nov. 1 killed 15 people and injured two others. Riot police pushed the protesters away from the building.