The Toronto Public Library is experiencing ongoing technical outages due to a Black Basta ransomware attack.

The Toronto Public Library (TPL) is Canada’s largest public library system, giving access to 12 million books through 100 branch libraries across the city. The library system has 1,200,000 registered members and operates on a budget that surpasses $200M.

The library warned that public computers and printing services are also unavailable.

The Toronto Public Library says that there is no evidence that the personal information of staff or customers has been compromised and that they are actively investigating the incident with law enforcement and third-party cybersecurity experts.

“TPL has proactively prepared for cybersecurity issues and promptly initiated measures to mitigate potential impacts,” reads a notice on a temporary library website hosted on Typepad.

“We have engaged with third-party cybersecurity experts to help us in resolving this situation. We do anticipate though that it may take several days before all systems are fully restored to normal operations.”

According to a TPL employee, the attack occurred overnight on October 27th, impacting numerous services Saturday morning.

The attack did not impact phones and had limited impact on email, with those logged into their Office 365 accounts still able to access them. However, employees who were not currently logged into email were no longer able to access the system.

All other internal systems were shut down after the attack as a precaution to prevent the spread of the malware.