A paramedic for the Honolulu EMS was critically injured from an unexpected accident when the ambulance he was working in exploded, leaving one other person dead.

A patient died and a paramedic was critically injured when their ambulance caught fire outside a hospital in Hawaii, emergency officials said.

“We had an ambulance tonight for reasons we don’t understand catch on fire, possibly explode, prior to entering the hospital,” said Dr. Jim Ireland, the emergency services director. “We’re all just very concerned about our team and the patient that lost their life.”

The 91-year-old patient and the paramedic were in the back of the ambulance as it pulled up to Adventist Castle Health in Kailua on Wednesday night. Another emergency medical technician who was driving the ambulance escaped injury after helping the injured paramedic escape the back of the burning vehicle.

Read the full story at ABC News.