After a 2-day walk and a night out in the open, protesting Belgrade university students in Serbia on Sunday got a taxi ride home — free of charge. Hundreds of cabbies organized to pick up students from the northern city of Novi Sad after a daylong blockade of bridges that is part of a widening anti-corruption movement gripping the Balkan nation.

The growing movement began following the collapse of a concrete canopy at the central train station in Novi Sad, killing 15 people.

Wrapped in blankets and huddled around fires at makeshift camps, Serbian students braved subzero temperatures in Novi Sad as they spent the night outside after a mass rally against corruption brought tens of thousands to the streets.