Austrian police say a man set his wife's parents on fire with a home-made flame thrower, killing them.

Chief investigator Anton Kiesl says the 48-year-old man set the elderly couple on fire as they lay in bed late Friday using a flame thrower he made from a propane gas container.

Kiesl said the woman burned to death in her bed and her husband's body was found on a bench outside their home in St. Magdalena am Lemberg in the southeast.

Both victims were in their 80s; the woman was bedridden.

Kiesl said Saturday the man fled and attempted to commit suicide by stabbing himself in the stomach. He is currently in an induced coma.

The Associated Press contributed to tihs report.