As the search for suspect Eric Frein continues, an ambulance was called to the search area in Price/Barrett Townships.

According to state police, the ambulance was summoned for a law enforcement officer who had a minor medical issue, and the issue was not associated with the search operations.

The officer is being treated, however, no further information will be released

Governor Tom Corbett and State Police Commissioner Frank Noonan are closely monitoring the investigation - and the Governor has made all commonwealth resources available for this investigation as needed.

"Based on our investigation, we know Frein has prepared and planned extensively for months or maybe years," said state police Lt. Col. George Bivens, deputy commissioner of operations. "He planned his attack and his retreat -- however, we believe we are closing in on him."

"Up until now his advantage has been that this is his backyard, he knows this rugged terrain." "Our tactical operations people now also know his backyard, the area he once felt safe in - we are pushing him hard, he is no longer safe there and I am confident he will be apprehended," said Lt. Col. Bivens.

"Based on our investigation, our search efforts at this point in time are primarily focused around the Pike and Monroe county border," said Lt. Col. Bivens. "We continue to follow-up on other leads and as we track his movements, our search efforts will be refocused accordingly."

State police are making significant progress in the investigation and have found several items he has abandoned or hidden for possible future use. Some of those items include an AK-47-style weapon and a significant number of rounds of ammunition, among other things.

"We are asking the public to use common sense and please avoid going into the wooded areas in and around Barrett and Price townships, as well as the Delaware State Forest area," said Lt. Col. Bivens. "We know archery season is right around the corner and hunters might be setting up equipment - so, we are asking you to refrain from that in these areas until Frein is captured," said Lt. Col. Bivens.

"However, if you do have photos or videos previously taken from trail cameras in those areas we are asking you to review those images and provide them to law enforcement should they contain images of Frein or other suspicious activity," said Lt. Col. Bivens.

"Also, if the public is aware of any shelters or bunkers that Frein may have constructed or used in the past to please report that information to the state police."