A Pennsylvania State Police fire marshal has determined what sparked a deadly explosion and fire in Northampton County.

William Neith Sr., 65, was killed in the explosion on Feb. 14 at 118 Hickory Hills Dr. in Moore Township.

The state police fire marshal's investigation determined the explosion and fire were caused by a liquid propane gas leak. The fire was ruled an accident.

One of Neith's relatives told 69 News that Neith's mobile home had been having heating problems, and that Neith did smell odors of gas in the days leading up to the explosion.