PORTLAND, Ore. (KOIN) — An unknown person or group is placing homemade spike strips and other booby-trap-like devices along U.S. Forest Service Roads in southwestern Oregon, according to authorities. Multiple people have contacted the U.S. Forest Service about spiked boards lying along roads in the Rogue River-Siskiyou National Forest. In some instances, the boards were covered with leaves, making them difficult to spot. An image shared by the department showed two of the spiked boards discovered on the roadways, both with long screws protruding upward. A spike strip made from wooden boards and sharp screws found in the Rogue River-Siskiyou National Forest. (USFS)The Rogue River-Siskiyou National Forest. (USFS) "We are saddened to report that someone has been 'spiking' Forest Service roads in the Taylor Creek and Shan Creek areas," the U.S. Forest Service said. "Hunting and mining interests have reported spikes and wires across roads and trails in the area." Golfer crushed to death by tree at course in Oregon Anyone with information about the incidents is asked to contact the Wild Rivers Ranger District or the Grants Pass Interagency Office.