FOND DU LAC, Wis. -

Fire officials say a duplex that exploded in Fond du Lac was vacant, but a person next door was injured.

Division chief Troy Haase says the explosion destroyed the back half of the duplex that had just been built and triggered a small fire about 5 a.m. Thursday. Haase told WLUK-TV the injured person was taken to St. Agnes Hospital.

Alliant Energy is on the scene and shut off service to the area.