 Now, news of the Kenai in Alaska, brought to you by Elite Auto and Diesel Repair. When your vehicle is acting trivial, call 262-2280. The Tustamina Lake fire was caused by an unintended campfire, according to officials with the Division of Forestry. While the cause has been identified, the individuals responsible have not yet been identified, although an investigation is ongoing. Fire Management Officer Howie Kent said it is very evident that the escaped campfire was the cause.