New Delhi, July 13 -- A physical therapist was killed when a sudden fire erupted inside a hyperbaric chamber at his Arizona wellness center. Emergency crews rushed to Walter Foxcroft's clinic in Lake Havasu City late Wednesday night after a 911 call reported a burn victim inside the pressurized oxygen pod, according to an NBC report.

Firefighters found heavy smoke and a 43-year-old Foxcroft dead inside the sealed chamber.

Authorities confirm the flash fire is under investigation but released no details about what sparked the blaze. Foxcroft had opened Havasu Health and Hyperbarics just last year, offering cutting-edge treatments for healing and recovery.

Hyperbaric chambers pump pure oxygen at high pressure to treat wounds, infections,...