The intense manhunt focussed on the fields and Adirondack woods near the prison in upstate New York after the inmates' escape was apparently hampered by a prison employee's decision to back out as their getaway driver nine days ago.
The inmates, David Sweat and Richard Matt, planned to have the now-jailed prison worker drive them about seven hours away to an unknown destination, District Attorney Andrew Wylie told CNN.
"One of the reasons that she didn't show up was because she did love her husband and didn't want to do this to him," Wylie said.
Even as hundreds of law enforcement workers stalked the rural area about 20 miles (30 kilometres) from Canada, Cuomo said it was unclear if the men were still nearby.
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"We don't know if they are still in the area or if they're in Mexico by now," Cuomo said yesterday in response to a question at a news conference on school aid in the New York City suburbs.
While many local residents remained locked in their homes at the advice of authorities, the outpouring of appreciation for the search effort continued. A restaurant was urging people to tie blue ribbons around trees and mailboxes.
"The locals have been awesome," said Sgt. Barry Cartier of the Franklin County Sheriff's Department, part of a crew from a neighbouring county working 12-hour shifts. "They come around with food all the time. We've got too much to eat." But residents were very much on edge, with some saying they were keeping firearms handy just in case. Both men are considered extremely dangerous.
The men used power tools to cut through the back of their cells, shimmied down a six-story catwalk, broke through a brick wall then cut into a steam pipe they used to reach a manhole outside the prison walls.