BENTON, Kan. (AP) — Authorities in southern Kansas’ Butler County are trying to determine what caused an apparently unattended rural house to explode.

Sheriff Kelly Herzet says the family that the blast leveled the structure near Benton about 5 a.m. Monday.

Authorities say a neighbor’s windows were blown out, but there were no injuries.

Herzet says he heard the blast from his house, about 20 miles away.