Natrona County Fire District

The call came in at 12:20 p.m. Thursday.

Fire Captain Darek Pepple, Firefighter Derek Higgins and Firefighter Chris Weaver are headed to the Mullen Fire in a brush unit.

Shortly before 11 p.m. Thursday, NCFD Chief Brian Oliver said the fire was six miles long.

The crash occurred shortly before 11 a.m. Sunday.

No further information has been made available.

The Natrona County Fire District said it will provide updates.