A pressurized oxygen chamber exploded Friday, killing a 5-year-old patient and injuring his mother at a suburban Detroit medical facility. The hyperbaric chamber explosion occurred about 8 a.m. at the Oxford Center in Troy,

Authorities are trying to determine what caused a hyperbaric oxygen chamber at a Troy medical facility to explode on Friday morning, killing a 5-year-old boy who was inside. First responders were called at about 7:54 a.