Travelers aboard a Southwest Airlines flight preparing to leave Denver Friday had to evacuate after a passenger’s cell phone battery caught on fire and caused an airplane seat to catch fire as well.

Passengers of a Southwest Airlines flight sitting at a Denver International Airport gate had to evacuate after a cell phone battery caught on fire.

A passenger whose cellphone caught fire was treated for burns, and one other passenger sustained minor injuries during the evacuation.

Southwest Airlines Flight 3316 was at a gate at the Denver International Airport when a spokesperson for the airline said a cellphone battery caught on fire. The flight was scheduled to take of at 6:05 a.