PORTSMOUTH, N.H. (AP) – Police aren’t fans of a pastime involving a high tech navigation device.

The department is sending out a message against GPS scavenger hunts after two reports of suspicious packages turned out to be prizes left for game participants.

The most recent incident was Sunday, when Portsmouth police were called to a supermarket to examine a suspicious package stuck to an outdoor electrical panel. The metallic case duct taped to the panel turned out to be a prize for players in a GPS scavenger hunt.

In November, police responded to a similar call when someone spotted a suspicious package stuck to the base of the Piscataqua River bridge.

Police say attaching suspicious items to private property, bridges, electrical panels causes public alarm and can be punished as trespassing, disorderly conduct and worse if a building is forced to evacuate.