TROY, MI -- An investigation is underway, but officials in Troy have confirmed a 5-year-old Royal Oak boy was killed Friday in an explosion at a medical facility.

A child in the Detroit suburbs was killed in an explosion while inside a hyperbaric chamber at a health care facility, authorities said.

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.