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.

Skirmishes have erupted for a second day in the northern Serbian city of Novi Sad between police and opposition protesters demanding arrests over a deadly roof collapse at the city’s railway station earlier this month.

Deadly incident occurred after Novi Sad station was renovated, protesters blaming sloppy work led by corrupt officials.