FAIRBANKS, Alaska (AP) — Authorities say a raging fire destroyed a gas station convenience store near Alaska's Denali National Park Sunday night and injured several people.Alaska State Trooper Sgt. Mike Roberts says three of the injured were hospitalized but several others were treated for burns at the scene.He says crews suspect an explosion near a checkout counter inside the store possibly touched off the fire in Cantwell.Firefighters received a call about the blaze about 6 p.m. and four hours later it had greatly diminished.The Fairbanks Daily News-Miner reports that the fire fighters were able to keep the flames away from the gasoline tanks and a propane tank.Roberts anticipated crews would be on scene all night putting out the smoldering fire.Cantwell is located just outside the eastern boundary of Denali National Park and about 175 miles north of Anchorage.