The deadly inferno started at roughly 5 p.m., according to Monika Kosiec, a police spokeswoman in Koszalin.
All of the deceased individuals were 15-year-old girls, according to Interior Minister Joachim Brudzinski. Their remains were recovered from the scene after responders extinguished the fire, Kosiec said.
The fire also injured a 25-year-old man, who suffered burns and was transported to the hospital, the police official said.
In a translated tweet, Brudzinski expressed his sympathies for the victim’s families. He also ordered fire safety controls in all “Escape Rooms."
In an "Escape Room" game, the players are locked inside a room or building and must find clues that help them get out.
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