A child in Wisconsin who attended a local Halloween event on Sunday went home with a small bag of meth among the candy in their trick-or-treat bag.

The child's parent turned over the plastic bag containing a crystal powder to police on the Menominee Indian Reservation in Keshena early Monday, according to WBAY-TV.  The powder tested positive for methamphetamine, police said.

The child did not ingest any of the drugs, but police say they don't know if this was an isolated incident and whether it was accidental or intentional.

"It is a Ziploc bag. Unfortunately Ziploc baggies can open up, we don't know if there's more out there," Menominee Tribal Police detective Joshua Lawe told WBAY. "Right now this is an isolated incident, but if there was more out there, if it does get through the Ziploc baggies and kids are touching this candy, that can be very dangerous to them. Even to the parents."

Parents are being urged by police to toss any candy received during the event held in the downtown area of Keshena.