CHICAGO -- The FBI says one of two bank robbers have been arrested after the pair's brazen escape from a high-rise federal jail in downtown Chicago sparked a dayslong manhunt.

FBI spokeswoman Joan Hyde says Joseph Banks was captured late Thursday.

Banks fled the Metropolitan Correctional Center early Tuesday with Kenneth Conley by apparently smashing a hole in a wall at the bottom of a narrow cell window and squeezing through, before scaling down about 20 stories using a knotted rope or bed sheets.

Police helicopters and canine units swarmed the Chicago area, but not until hours after the men were last accounted for by correctional officers' headcount. The search later spread beyond Chicago to the homes of anyone officers could find with ties to the men.

Both face hefty prison sentences.