St Helens Council said it was working with national agencies to investigate the Ransomware incident.
The local authority said the incident was having an impact on how some services were being delivered.
We are working hard to adapt to the situation and work around these issues to limit the disruption experienced by our residents, but this has affected how some of our services are delivered, but we are working hard to adapt to the situation and work around these issues to limit the disruption experienced by our residents.
However, access to some services on the council's website will be disrupted over the weekend.
Thank you for your support and understanding while we adjust to the challenges this situation brings. The council warned residents to be aware of any communication they may receive from the local authority.
We're still working to understand more on the impact of this attack, and when we have further information we will share it with residents, the spokeswoman said.
Please be sure that we are doing all we can to better understand the issues, protect our systems and continue to provide council services. The content of external sites is not controlled by the BBC.