Serbia’s construction minister resigned after 14 people were crushed to death last week by a falling canopy at a railway station that was rebuilt by European and Chinese firms two years ago.

Serbia wound up a rescue operation and opened an investigation on Saturday into a roof collapse at a railway station in the northern city of Novi Sad that killed 14 people and injured three others. The disaster happened on Friday when a length of roofing along the entrance to the station collapsed.

Angry protesters have left red handprints in front of government buildings in the Serbian capital to demand the arrest of officials, two days after a concrete canopy collapsed at a railway station, killing 14 people and injuring three.