Boston Public Library was hit with a cybersecurity attack August 25 that crippled its computer network, the library said in a statement August 27. There is no evidence that sensitive employee or patron data has been compromised; affected systems were taken offline immediately, and steps were taken to isolate the problem and shut down network communication. BPL’s IT department is working with the mayor’s Department of Innovation and Technology on restoring services, and law enforcement has been contacted. The central branch as well as about two dozen neighborhood branch locations remain open and workers are manually checking out books.