On Monday, the Clearwater County Sheriff’s Office says dispatch received a call about an explosion and fire at a storage unit north of Bagley around 12:30 p.m.

When officers and police arrived, they found a man and five children between the ages of six and 14 with burns from an explosion.

The sheriff’s office says they believe a propane tank had leaked into the metal storage unit, and when the doors opened and the man lit a cigarette, it caused an explosion.

People in the area helped the six victims until first responders arrived, the sheriff’s office says, and the six injured were taken by ambulance to local hospitals.

The sheriff’s office says they do not know the conditions of the victims.

The Minnesota State Fire Marshal’s Office is investigating the incident.