(AP) — Investigators are trying to determine what caused a fire that killed a 70-year-old man during the weekend.

Burden Fire Captain Dan McClaskey says three people were inside a home seven miles east of Winfield when the fire started early Sunday.

A woman and her grandson were able to escape but the 70-year-old grandfather died later after being pulled from the house.

The cause of the fire is still under investigation. McClaskey says he thinks it started around a space heater.