"Apparently somebody donated an old microwave and then left, and sometime later in day someone there opened the microwave and found a bag full of marijuana," Sgt. Jim Gillio said. "But they have no idea who dropped it off."

Members of the Gilroy Girl Scout Service Unit 604 were collecting "e-waste" at Ascencion Solorsano Middle School as part of a fundraising effort to send the scouts to Switzerland. The scouts have raised more than $6,000, but have an additional $24,000 to go until they reach their goal. There they plan to hike, enjoy the outdoors and frequent tourist destinations, said a Girl Scout representative who would not give her name.

Depending on the quality, four ounces of marijuana can sell for about $1,200 on the streets, according to law enforcement reports. Police took possession of the narcotics for destruction.