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.

BELGRADE, Serbia (AP) — Serbian opposition protesters blocked a court house Tuesday over a deadly roof collapse at a railway station in the country’s north earlier this month, setting off a standoff with riot police in a sign of persistent tensions over the crash.