Thousands of student protesters and others marked three months since the fatal November 1 collapse of a concrete roof at a rail station in Novi Sad, blocking three bridges in Serbia’s second-largest city as pressure built on President Aleksandar Vucic’s government.

Spending the night in tents and sleeping bags in cold weather, Serbian students on Sunday led an overnight Danube bridge blockade in the northern city of Novi Sad as part of their growing anti-graft movement demanding major changes in the Balkan country.