A number of schools in South Gloucestershire have been left without access to their IT systems after being subjected to a targeted ransomware attack.
All schools in the Castle School Education Trust are affected, including Castle School and Marlwood School.
In an update posted on the Castle School's Facebook page headteacher Joe Docherty said: "The team are working extremely hard to address the problem, but we cannot currently give a time frame for a resolution to the issue.
"As you can imagine this is the last thing we need in the current situation, as we adapt our teaching, systems and communications in the face of this challenge.
"Thank you for your patience and understanding."
As a result of the attack the Year 8 parents evening will not take place tomorrow. Anyone needing to contact the school should call rather than use email.
"The impact of this means there will be no live lessons and ShowMyHomework may be affected," Mr Docherty added.
Schools in the Castle School Education Trust:
- Charfield Primary School
- Downend School
- Lyde Green Primary School
- Mangotsfield School
- Marlwood School
- Severn Beach Primary School
- The Castle School
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