IDAHO FALLS—Four people suffered severe burns when their attempt to build a bonfire resulted in an explosion Friday night near Idaho Falls.

Ten individuals had gathered in the Kepps Crossing area east of Idaho Falls to build the bonfire around 10 p.m. when one of them threw gasoline onto the fire, causing the explosion.

Bonneville County sheriff's deputies were dispatched to the scene after the explosion was reported. The deputies intercepted several private vehicles on Sunnyside Road that were transporting the four burned individuals to Eastern Idaho Regional Medical Center for treatment.

The burn victims were then transported to EIRMC via the private vehicles as well as an ambulance.

Three of the victims—men ages 22, 21 and 18—were flown from EIRMC via emergency helicopter to the University of Utah Burn Center in Salt Lake City. The fourth victim, a 17-year-old girl, was still receiving treatment at EIRMC as of Saturday night.

The Bonneville County Sheriff's Office had not released the names of any of the victims as of Saturday night. The Sheriff's Office also did not have condition updates on any of the victims but said the burns were serious.

Kepps Crossing is a bridge along Willow Creek and the Sheriff's Office said that area once was a popular spot for bonfires but not so much in recent years. The 10 individuals who had gathered there Friday night to start a bonfire were all either teenagers or young adults.

Because of the incident, Sgt. Jeff Edwards of the Sheriff's Office said deputies will be "increasing patrols in that area to make sure this sort of thing doesn't occur again."

The bonfire explosion remains under investigation by the Sheriff's Office.