LAWRENCE, Kan. (AP) — Investigators say they believe a house fire that killed a man was purposely set.

The Lawrence Journal-World reports that Fernando Alvarez’s body was found inside his home after the fire early Wednesday.

Lawrence Police Sgt. Trent McKinley says that officers responded to the home to investigate a reported domestic dispute involving claims that a man was displaying a handgun and threatening a woman and children.

McKinley says that while talking with the woman outside the home, officers saw a flickering light from inside the home moments before noticing the residence was on fire.

The cause of Alvarez’s death was not immediately disclosed.