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A massive fire tore through an overcrowded nightclub in North Macedonia on Sunday, killing 59 people and injuring 155 in a chaotic escape during a live concert. The tragedy focused national attention on corruption in the small Balkan country as authorities detained 15 people.

The death toll may rise further, with 20 of the injured remaining in critical condition, according to Health Minister Arben Taravari. The government has declared seven days of national mourning.

The pre-dawn blaze in the eastern town of Kocani left mostly young people dead and injured due to burns, smoke inhalation and a stampede in the desperate effort to reach the building’s single exit, officials said. People as young as 16 were among the casualties, they said.

Videos showed sparkling pyrotechnics on the stage hitting the ceiling, followed by scenes of chaos inside the club, with young people running through the smoke as the musicians urged them to escape as quickly as possible.

The fire caused the roof of the single-story building to partially collapse, revealing the charred remains of wooden beams and debris. Police cordoned off the site and sent in evidence-gathering teams in an operation also involving state prosecutors.

Interior Minister Panche Toshkovski said 15 people were detained for questioning after a preliminary inspection revealed the club was operating without a proper licence. He said the number of people inside the club was at least double its official capacity of 250.

AP