A natural gas fire that killed two people and destroyed a Chevron Corp. rig off the coast of Nigeria in January has stopped on its own. The gas at the Funiwa field, just off Bayelsa state, stopped bubbling to the surface of the Atlantic Ocean on Friday, extinguishing a fire, Chevron spokesman Russell A. Johnson said. He added the gas could begin flowing again from the well, AP said. A series of explosions hit the natural gas rig 10 kilometers from shore on January 16, killing two workers.