( CNN ) -- A warden and a security official have resigned their posts at an Arizona state prison where three inmates escaped last month , a spokesman for the private company that runs the facility said Sunday . Unit Warden Lori Lieder and an unidentified unit security chief resigned last week from Arizona State Prison -- Kingman , according to Carl Stuart , a spokesman for Management & Training Corp . The resignations come amid a nationwide search for the last of the three escaped inmates , John McCluskey , and his alleged accomplice , Casslyn Mae Welch . McCluskey , 45 , was serving a 15-year sentence for attempted second-degree murder and other charges when he and fellow convicts Tracy Province and Daniel Renwick broke out of the prison July 30 , allegedly with Welch 's help . Welch , who was on the visitation list for one of the inmates , threw cutting tools over a prison fence , according to Charles Ryan , director of Arizona 's Department of Corrections . Ryan has noted some `` operational security problems '' at the prison . `` Those are being evaluated and investigated as we speak , '' he said earlier this month . Renwick , 36 , was captured August 1 in a shootout with police in Rifle , Colorado . He was serving 22 years for second-degree murder when he escaped . Province , 42 , was rearrested Monday in Meeteetse , Wyoming , near Yellowstone National Park when authorities were notified by a local resident who sat and talked with Province a day earlier on the steps of a church in town . He was serving a life sentence for murder and armed robbery . Renwick remains in the Garfield County , Colorado , Jail on charges of attempted first-degree murder and eluding police , the U.S . Marshals Service said Sunday . Authorities are working to coordinate the transport of Province back to Arizona from Wyoming -- expected to occur within the next month , the marshals service said . Meanwhile , the hunt for McCluskey and Welch continued in western Montana and along the border with Canada , the marshals service said . The last credible sighting of the pair occurred August 6 in Billings , Montana , the marshals service said . A reward of up to $ 35,000 is being offered for information that leads to their arrests . McCluskey is believed to have dyed his hair dark and grown a beard and Welch may have blonde hair . `` All information indicates McCluskey and Welch are still traveling together and should be considered armed and extremely dangerous , '' the marshals service said in a news release . `` It is likely they are reacting , rather than taking deliberate action . As the manhunt protracts , it is highly possible they will become more desperate , creating increased danger to law enforcement and the general public . If they are encountered , call local law enforcement immediately . '' McCluskey and Welch are also suspected in the killings of a couple whose bodies were found in their burned out camper earlier this month in New Mexico , according to authorities . Authorities said they are likely driving a gray , gold or tan 1997 Nissan Sentra , though both are experienced semitruck drivers known to have frequented truck stops , rest areas and campgrounds .
A warden and a security official resigned last week , a prison spokesman says . The resignations come amid a nationwide search for inmate and his alleged accomplice . Two other escapees from the prison have been arrested . Authorities are concentrating search efforts in Montana and along the Canadian border .