Police in Michigan have arrested four people after a 5-year-old boy receiving treatment at The Oxford Center died when the hyperbaric chamber he was in exploded.

Allegedly, neither a medical doctor nor a safety supervisor was at the medical facility when the chamber exploded.

The Michigan attorney general has accused the owner of a medical center and three of its employees of ignoring safety standards to make a profit.

Michigan Attorney General Dana Nessel has charged four people in connection with the death of a 5-year-old boy who was killed in a hyperbaric chamber explosion.