Woman dies and another in hospital after cryotherapy session at Paris gym

Sources close to police inquiry say an employee collapsed after nitrogen leak and second woman is in intensive care

Police in Paris have launched an investigation after a woman suffocated while undergoing a cryotherapy session at a city gym and a second is in intensive care.

The dead woman, a 29-year-old employee of the gym, collapsed after a nitrogen leak from a cold chamber that had been repaired earlier in the day, sources close to the inquiry said. The colourless and odourless gas is used to create an atmosphere of extreme subzero temperatures.