The Pennsylvania Game Commission is warning hunters, hikers and others to be careful after officials found a "spike strip" on a state game lands trail in south-central Pennsylvania.

The commission says someone put a piece of wood with several large screws protruding from it on the trail in state game lands 305 in South Middleton Township. That's in Cumberland County, about 20 miles southwest of Harrisburg.

Game officials say it appears the strip was placed there intentionally and hidden, apparently so it would puncture the tires -- or the feet -- of any hunters, hikers or birdwatchers walking or riding along the trail.

Game officers are trying to determine who put the strip on the trail and plan to prosecute whoever they find.