FOXBORO (CBS) – The Department of Conservation and Recreation and Massachusetts Environmental Police are warning riders and hikers that someone is stringing wire cables across state trails with the intent of causing serious harm.

“After receiving reports made by members of the public, the Department of Conservation and Recreation (DCR) and the Massachusetts Environmental Police issued a warning to all Off Highway Motorcycle (OHM) riders and other users of wire cables being tied across trails with the intent to cause serious harm,”said DCR Spokesman Troy Wall. “The DCR and the Environmental Police ask all individuals to report anything suspicious, and to be alert of their surroundings.”

Signs have been posted on hiking trails by police who want nature lovers to look out for the wires. They’ve been reported in the F. Gilbert Hills State Forest in Foxboro, the Franklin State Forest, the Wrentham State Forest and the Freetown State Forest.

Anyone who sees something suspicious is asked to call police at 1-800-632-8075

So far no serious injuries have been reported.

“It’s scary, wondering who’s out here trying to hurt all the hikers or the bikers or even the horseback riders,” one hiker told WBZ-TV’s Bill Shields.