ADDS NAME OF VICTIM - A debris field is all that remains Monday, August 12, 2019 of a house that exploded Sunday in the Waupaca County town of Lebanon, Wis. killing the man who owned the home.  The Waupaca County Sheriff's Office identifies the victim as 64-year-old Mark Steven Zielke. (William Glasheen/The Post-Crescent via AP)

MANAWA, Wis. (AP) — Authorities in Wisconsin say a man was likely asleep when his home exploded, killing him.

Waupaca County Sheriff Tim Wilz tells news outlets that the home was "totally obliterated" by the Sunday morning explosion. The sheriff's office identifies the victim as 64-year-old Mark Steven Zielke.

Manawa Rural Fire Chief Rob Rosenau says debris was "scattered all over the place." Rosenau said he'd seen something like the scene "only on TV."

News outlets report the debris spread at least 500 feet (150 meters), damaging nearby properties.

The cause of the explosion has not yet been determined. Wilz says the fire marshal conducted an initial investigation and insurance companies will send over their own investigators.

ADDS NAME OF VICTIM - A debris field is all that remains of a house that exploded Sunday in the Waupaca County town of Lebanon, Wis. killing the man who owned the home. The Waupaca County Sheriff's Office identifies the victim as 64-year-old Mark Steven Zielke.  (William Glasheen/The Post-Crescent via AP)
ADDS NAME OF VICTIM - A neighboring house with boarded windows is seen Monday, August 12, 2019 after a house exploded Sunday in the Waupaca County town of Lebanon, Wis. killing the man who owned the home. The Waupaca County Sheriff's Office identifies the victim as 64-year-old Mark Steven Zielke.   (William Glasheen/The Post-Crescent via AP)