A fire that broke out at an “escape room” game in northern Poland killed five teenage girls and injured a man, the authorities said.
Interior Minister Joachim Brudzinski said the girls were all 15 years old, adding that he had ordered fire safety checks at all such sites in Poland.
The blaze began around 5 p.m. Friday in Koszalin, about 240 miles northwest of Warsaw. The cause of the fire was not immediately clear.
In the game, which is popular with teenagers worldwide, players are locked inside a room or building and they must work together to find clues and solve puzzles to escape simulated danger before time runs out.
Monika Kosiec, a spokeswoman for the Koszalin police, said the victims were thought to have been celebrating a birthday. She said a 25-year-old man had been hospitalized with burns and could not be immediately questioned by investigators.
A spokesman for regional firefighters, Tomasz Kubiak, said the bodies had been found in a room that was near the blaze but was not hit directly by it.
The Polish state news agency PAP said it that the girls had died from carbon monoxide asphyxiation.
None of the victims were immediately identified.
Footage on the private TVN24 channel showed ambulances and fire engines in front of a detached two-story house with a large Escape Room sign in front.
President Andrzej Duda said on Twitter it was a “crushing tragedy” that five young girls had died so early in their lives.
Koszalin’s mayor, Piotr Jedlinski, announced that Sunday would be a day of mourning in the city.
The industry behind escape rooms, which originated in Japan and evolved from video games, has grown rapidly around the world in recent years. Most of the sites in the United States are mom-and-pop operations with one or two sites. In 2014, there were 22 escape room companies in the United States; that number has grown to 2,000, according to enthusiasts.
Mission Escape Games, which opened in 2014 in New York and now has four other locations, says it attracted 140,000 visitors in 2017.
In Britain, the number of escape rooms has soared to more than 1,000 as of last year from seven in 2013, according to the BBC.