Federal, state and local agencies were continuing to search Sunday for an inmate who escaped from a Pennsylvania prison using a rope made of bed sheets, authorities said.

The City of Warren Police Department said Michael Charles Burham, 34, escaped from the Warren County Prison on Thursday by tying sheets together to make a rope and using it to slide off the roof of the prison, reported the Erie Times-News, part of the USA TODAY Network.

Burham is wanted in connection with the killing of a woman in Jamestown, New York, on May 11, the publication reported. He is accused of fleeing the area after her death, which led to a multi-agency manhunt that ended with his arrest in South Carolina on May 24.

Burham – who has not been charged in the homicide – has been charged with kidnapping an elderly couple and stealing their SUV at gunpoint on May 20 to drive to South Carolina, the Times-News reported.

Burham was being held on a $1 million bond in the kidnapping case. 

Who is Michael Burham?

Burham is “dangerous” and “should not be approached,” Warren city police said.

In a Saturday news conference, Lt. Col. George Bivens of the Pennsylvania State Police said Burham is a “self-taught survivalist with military experience and could be potentially holed up in a wooded area,” The Associated Press reported.

The U.S. Marshalls Service was offering a $7,500 reward for information leading to Burham’s capture, and Crime Stoppers was offering $2,000, Bivens said.

Police urge residents to lock their doors and stay vigilant

Police said Burham was last seen at around 11:20 p.m. local time Thursday wearing an orange and white striped jumpsuit, a blue denim jacket and Crocs.

“All citizens are urged to lock their doors and stay vigilant,” Warren police said. “The public is asked to report anything unusual to law enforcement by calling 911 and they should expect to see an increase in law enforcement presence in the area.”

Police said Burham’s whereabouts remain unknown, and the search area has expanded beyond Warren.