He was taken to hospital suffering from severe burns but was in a critical condition in intensive care last night so police have been unable to question him.
It's an interactive game where people pay money to enter a room where they must solve puzzles and riddles in a race against the clock to escape from the locked room.
Identifying the suspect only as Milosz S. for legal reasons, Gasiorowski said he had neglected to ensure escape routes that could have allowed the girls to flee when the blaze broke out.
They were the first known deaths in an escape room, a form of entertainment that has been growing in Poland over the past five years.
Asphyxiation is the probable cause of the deaths, officials said.
Minister Brudzinski directed the state fire service to carry out fire security controls in every escape room across the country, of which there are more than 1,000. Regarded as an intellectual challenge, the games are highly popular among teenagers in Poland.
Police and fire brigade officers in Oswiecim, Poland, Friday, Febuary 10, 2017.
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It happened in a residential building that is home to an escape room.
Earlier on Saturday, national firefighters' chief Leszek Suski said there was evidence of "a lot of negligence" at the venue, including makeshift electrical wiring too close to flammable materials and the absence of a proper evacuation route.
The goverment has now ordered fire safety checks to be held at all Escape Room locations in Poland.
It has been announced that Sunday will be a day of mourning in the city.
Prime Minister Mateusz Morawiecki has sent condolences to the victims' relatives.
It has now been reported that Polish prosecutors probing the deaths of the five teenage girls have said they had charged an owner of the facility with deliberately creating a fire hazard that led to the blaze.