MONONA, Wis. (AP) — Police found a marijuana growing operation and explosives during a search for a missing juvenile near Madison, authorities said.

Town of Madison police thought the juvenile might be at the house in Monona but was not found there during Sunday’s search.

Monona Police Chief Walter Ostrenga says officers found numerous marijuana plants along with a growing operation. Ostrenga says they also found various components used to manufacture explosives.

Police arrested Todd Engle, 54, the owner of the house in the 400 block of Labelle Lane on a tentative charge of maintaining a drug dwelling. Other charges were possible, Ostrenga said.

The Dane County Sheriff’s Office assisted in removing the explosive materials from the house.