HOLTON, Kan. — Jackson County authorities say an apparent propane leak caused an explosion in northeast Kansas last week that killed one man and seriously injured his wife. Sheriff Tim Morse said Monday a great amount of propane leaked into the home of 61-year-old Billy “Lu” Griffiths and his wife, Teri, in rural Holton on May 10. It’s unclear exactly what sparked the gas but Morse said the explosion was not believed to be a criminal act. Billy Griffiths died in the blast and his wife was hospitalized with serious injuries. Original Story: HOLTON, Kan. — Officials in northeastern Kansas say a house explosion has left one man dead and a woman seriously injured.