Angry protesters left red handprints at the entrances to government buildings in the Serbian capital on Sunday to demand the arrest of officials after a concrete canopy collapsed at a train station in the north of the country, killing 14 people and seriously injuring three others.

Police formed a cordon outside the Ministry of Construction and Infrastructure in central Belgrade as several thousand people called on senior ministers, including Prime Minister Milos Vucevic, to resign immediately.

“Arrest, arrest!” chanted the crowd.

They shouted at police officers outside the building that they were “guarding criminals” and that they had “bloody hands on your hands” while holding signs reading “Corruption kills” and “We’re all under the canopy!”

Opposition political activist Nikola Ristic urged: “Wherever you can, leave bloody hands so they know their hands are bloody. In every city in Serbia, wherever you can.”

The concrete canopy running along the front of the station in the northern city of Novi Sad collapsed suddenly on Friday, landing on people sitting on benches or passing through the building’s entrance.

Surveillance camera footage showed the canopy collapsed within seconds.

Among the dead was a six-year-old girl.

The three injured, aged between 18 and 24, had to have all their limbs amputated and were still in serious condition on Sunday, doctors said.

The funerals of the victims, attended by thousands of people, took place in northern Serbia.

The station has been renovated twice in recent years, and critics of Serbia’s populist government have blamed rampant corruption, lack of transparency and sloppy renovations for the disaster. The renovation was part of a larger deal with Chinese construction companies.

Liberal politician Biljana Stojkovic said: “Citizens have nothing left to lose, they are becoming more and more aware of this. This is pain combined with anger, desperation turning to rage.”

Serbia’s populist government has promised a thorough investigation, with prosecutors saying they have already questioned more than two dozen people.

But critics believe justice is unlikely to be served with populists firmly in control of the judiciary and police.

Officials insisted the canopy was part of renovation work, suggesting that was the reason it collapsed, but offered no explanation as to why.

Novi Sad station was originally built in 1964, while the renovated station was inaugurated by President Aleksandar Vucic and his populist ally, Hungarian Prime Minister Viktor Orbán, more than two years ago as a major stopover for a railway line planned fast railway between Belgrade and Budapest.