This booking photo provided by the Warren, Pa., City Police Department shows Michael Burham. Authorities searching for the inmate described by police as “very dangerous” who used bed sheets to escape from a northwestern Pennsylvania jail on Thursday, July 6, 2023, say they believe he is still in the area and have found stockpiles or campsites in the woods he may have been using. Burham was a suspect in a homicide investigation and was being held on $1 million bail on kidnapping, burglary and other charges, authorities said. (Warren City Police Department via AP)

WARREN, Pa. (AP) — Authorities are seeking information about a drone that may have been operating near a northwestern Pennsylvania jail before the escape of a homicide suspect last week, and they say they have increasing concerns that the escaped prisoner may be armed. Michael Burham fled the Warren County Prison late Thursday by climbing on exercise equipment, climbing through a window and then down a rope fashioned from jail bedding, authorities said. He remains on the loose. County commissioners are vowing security upgrades and a thorough review of procedures following the escape of a homicide suspect who used bedsheets to escape from a northwestern Pennsylvania jail last week.