Hunting season in the Poconos in northeastern Pennsylvania is on hold as the manhunt continues for cop-killer Eric Frein, NBC reported.

Although Frein has not been located, authorities said they found traces that he was in the area, including discarded pipe bombs along the border of Monroe and Pike counties.

In addition, they have been at least 75 yards away from him, and found other supplies belonging to him -- including soiled diapers.

Game Commissioner James Delaney said that safety is the key concern in postponing hunting season indefinitely in Price, Barrett, Paradise, Blooming Grove, Porter, Lehman and Greene Townships.

"The closure affects all private and public lands, including the portions of State Game Lands 180, 183 and 221 located within those townships," a game commission news release states, according to Fox 29 Philly. "Those portions of game lands are closed to all public access while the executive order is in effect."

Frein allegedly killed a state trooper and critically injured a second on Sept. 12 during an ambush in Blooming Grove which authorities say he planned for at least two years.

The Cold War re-enactor is considered dangerous and poses a threat to anyone he may cross, since he has a clear disregard for human life, authorities have said. As a result, they hope hunters and trappers affected by the ban understand the need for it.

"While we realize this temporary closure might disappoint some of the hunters and trappers it affects, we're certain, too, they understand the gravity of the situation, as well as the danger in allowing the seasons to continue as scheduled, given this new information. Plenty of good hunting and trapping opportunities remain outside of the temporarily closed area, and we need hunters to readily adjust their plans to help bring resolution to this case and see that justice is served," Game Commission Executive Director R. Matthew Hough said in a news release Wednesday.