The personal information of some London Public Library employees was snatched in last month's cyberattack.
Library officials confirmed on Wednesday that cybersecurity experts hired to restore systems and investigate the December 13 incident made the determination.
"Although the investigation is ongoing, it has thus far revealed that the personal information of some London Public Library employees has been accessed by the perpetrators of the attack," the library said in a statement. "London Public Library has notified the Information and Privacy Commissioner (IPC) of the cyberattack and the compromise of personal information."
It has not been made public what type of personal data was taken or how many workers are affected.
Library officials have reassured that at this point there is no indication that the personal information of library patrons was obtained.
"The information accessed does not include any credit card details as online library fee payment and online donation transactions are conducted using external banking/ecommerce platforms that were not affected by the cyberattack," the library added.
The cyberattack knocked out the library's website, online catalogue, computers, public Wi-Fi, digital resources, and ability to allow users to place items on hold. Three of the library's 16 branches were also closed as a result.Those branches - Carson, Lambeth and Glanworth - reopened on Tuesday.
The Libby/OverDrive platform for borrowing ebooks and audiobooks and other digital resources, WiFi, and telephone and email systems have been restored. Library officials are hopeful public computer access will be up and running again "very soon". Work to restore the library’s catalogue and lending systems, including holds, returns and check ins of books and other physical items, is ongoing.