MIDDLEVILLE, Mich. (AP) — Authorities say two teenage workers at a western Michigan dairy farm have died after falling into a silo.

The Barry County Sheriff's Department says the accident happened Monday evening. The farm is about 125 miles west of Detroit.

Authorities identified the victims as 18-year-old Victor Perez and 17-year-old Francisco M. Martinez. Authorities say they were using a power-washer to clean a 10-foot high silo when they fell in. The silo was used to store a molasses-type mixture used in cow feed.

Farm worker Bob Forbes told The Grand Rapids Press the teens weren't doing something particularly dangerous and they knew how to do it.

Sheriff Dar Leaf says authorities may never know exactly what happened.