BELLMONT, N.Y. — A maximum-security prison guard believed to have delivered tools inside frozen meat to two inmates who later escaped was arrested Wednesday, authorities said.

Gene Palmer faces charges including promoting prison contraband and tampering with physical evidence, state police said. He was to be arraigned Wednesday night in Plattsburgh. A call to his attorney seeking comment wasn’t answered.

Inmates David Sweat and Richard Matt were reported missing from the Clinton County Correctional Facility in upstate Dannemora on June 6. Authorities say they cut through the steel wall at the back of their cells, crawled down a catwalk, broke through a brick wall, cut their way into and out of a steam pipe and then sliced through the chain and lock on a manhole cover outside the prison.

Prison employee Joyce Mitchell also has been charged with helping them escape. The prison tailor shop instructor has pleaded not guilty and remains in custody.

Clinton County District Attorney Andrew Wylie said Mitchell told investigators she smuggled hacksaw blades, a screwdriver and other tools into the prison by placing them in frozen hamburger meat. He said she then put the meat in a refrigerator in the tailor shop where she worked, and Palmer took the meat to Sweat and Matt, who were housed in a section where inmates are allowed to cook their own meals. The district attorney said the guard didn’t know the tools were in the meat.

Palmer had been placed on leave on Tuesday. At the time, his attorney Andrew Brockway told Plattsburgh television station WPTZ he was completely forthcoming during several hours of questioning on Saturday.

“I can 100 percent confirm that he did not know they were planning on breaking out of the prison,” Brockway said.

Searchers hunting for the escaped killers Wednesday were contending with steep slopes, thick woods, sticky bogs, biting bugs and the possibility that the pair on the lam from prison for 19 days is armed.

Police said they remain almost 100 percent certain that Sweat and Matt spent time recently at a hunting camp about 20 miles west of the correctional facility near Owls Head. A hunter said he saw a figure bolting from the cabin Saturday morning. But after days of intense searching with dogs and helicopters, police still had no substantiated sightings of Sweat and Matt.

The 75 square miles searchers focused on is on the northern edge of the sprawling Adirondack Park and includes woods so thick that visibility is only a few feet in some sections, authorities said. The woods also are dotted with hundreds of seasonal and hunting camps.

State police Maj. Charles Guess said Wednesday that authorities don’t have confirmed evidence that a shotgun was stolen from the hunting cabin near Owls Head, but they’ve always assumed the escapees were armed. Weapons and ammunition are typically stored in camps, but not everyone keeps an inventory of their firearms, he said.

“Just about every cabin or outbuilding in the North Country has one or more shotguns or weapons, and we have since day one operated under the belief that these men are armed,” Guess said. “They are extremely dangerous, they’re cunning. Why wouldn’t they try to arm themselves immediately upon escape?”