After announcing that it had experienced a major outage at the beginning of the month, The British Library confirmed on Nov. 14 that the disruption was due to a ransomware attack.

And recovery has been slow. Three weeks after the attack, the library’s website is still offline. The IT outage affects the library’s online systems, services, and onsite facilities such as the Wi-Fi.

In an update on its website, the facility — which is the United Kingdom’s national library, as its name suggests — noted that it has taken protective measures in response to the attack and is undergoing a forensic investigation with the help of the London Metropolitan Police and the National Cyber Security Center (NCSC), along with private cybersecurity specialists.