SIGEL, WI (WTAQ) - Three people killed in a house fire near Wisconsin Rapids were identified Thursday as 79-year-old William Heiser, his 71-year-old wife Janet, and their 38-year-old son William.

Wood County Coroner Garry Kronstedt said all three died from smoke inhalation, at the home they shared about six miles northwest of Rapids in the town of Sigel.

State and local investigators are still trying to figure out what caused the fire, which broke out early yesterday.

Foul play is not suspected.