Search for Escaped New York Prison Inmates Expands to Vermont

PHOTO: In this handout from New York State Police, convicted murderers David Sweat, left, and Richard Matt, right, are shown in this composite image. PlayNew York State Police/Getty Images
WATCH Urgent Hunt For Two Convicted Killers Who May Be Headed for Vermont

The inmates who pulled off a brazen escape from a maximum-security prison in upstate New York may have considered Vermont as "a possible destination," New York Gov. Andrew Cuomo said today.

Cuomo and Vermont Gov. Peter Shumlin held a joint news conference this afternoon in Dannemora, New York, outside the prison, detailing the ways in which Vermont authorities are working to prepare in case David Sweat and Richard Matt headed to the Green Mountain state. Prison guards realized on early Saturday morning that the two inmates were missing.

"Although we don't know where they are ... the destination they might have indicated is the state of Vermont," Shumlin said.

"They thought that New York was going to be hot, Vermont would be cooler in terms of law enforcement, and a camp in Vermont may be a better place to be," he said.

The clue about Vermont came as part of the investigation, and it is not clear if it came as a result of the interviews with employees at the prison or if it was one of the tips that was called in.

New York State Police Superintendent Joseph D'Amico said that they have received more than 500 tips today alone and they are following up on all of them. Corrections officers, other inmates and contract employees who worked at the prisons are among those being interviewed by investigators, and D'Amico confirmed that training supervisor Joyce Mitchell was among the interviewees.

"She befriended the inmates and she may have had some role in assisting them but I'm not going to go into any further details," D'Amico said.

According to two sources briefed on the probe, Mitchell, who has not been charged, is cooperating with investigators.

Authorities are investigating whether she played a role in the escapees getting the tools that they used to break out of prison, the sources said.

Cuomo said that "it's very possible" the escapees "had a several-hour head start on us" making the potential search area relatively widespread.

PHOTO: New York Governor Andrew Cuomo holds a press conference on the missing escaped convicts, June 10, 2015. ABC News
New York Governor Andrew Cuomo holds a press conference on the missing escaped convicts, June 10, 2015.

“I am confident we will find them. The only question is when,” he said.

Today marks day five in the search for the two convicted killers, who escaped from Clinton Correctional Facility, about 20 miles south of the Canadian border.

New York State is offering a $100,000 reward for information leading to the apprehension and arrest of Matt and Sweat.

Using power tools, Sweat, 34, and Matt, 48, escaped the prison by cutting through a steel wall and breaking down bricks. They crawled through a steam pipe until reaching a manhole in the street outside the facility, authorities said.

Get real-time updates as this story unfolds. To start, just "star" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.