As law enforcement officers continue to search for prison escapees David Sweat and Richard Matt, police have released "progression photos" of what they may look like after several days.

New York State Police investigators hope the new images will assist in efforts to locate the men. They broke out of Clinton Correctional Facility in Dannemora on June 6.

At a briefing June 16, police said they would remain "relentless" in working to track down Sweat and Matt.

Richard Matt, as seen in New York State Police progression photo released June 17, 2015.

Authorities are urging people to report any information that may help bring the escapees back into custody. Tips may be provided by calling 1-800-GIVETIP.

About 200 fewer law enforcement officers now are being deployed in the area near the Dannemora prison because police are "no longer containing a hard perimeter."

Investigators say more than 1300 leads have been received since the manhunt began. They say there's "no hard evidence" Sweat and Matt are outside the area around the prison. But they acknowledge they are "not ruling anything out" because they still don't know whether they may have been transported out of the region shortly after they got out the maximum-security facility.

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