A 5-year-old boy was killed after a hyperbaric chamber blew up inside the building. His mom, who was next to the chamber at the time, also suffered injuries to her arms.

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.

The medical facility, The Oxford Center, is located at 165 Kirts Boulevard. The explosion happened shortly before 8 a.m. and police said the boy was found dead inside the chamber. His mother, who was injured, was there with him at the facility, officials said.

A 5-year-old boy was killed and his mother was injured after a hyperbaric chamber exploded at a medical facility in Troy, Michigan.