Linslade School, Mentmore Road, closed its doors at 12.30pm today due to electrical problems.
The middle school has posted on social media site, Twitter, stating that the phone lines are down, although parents can still text the staff.
A “big digger” is also on site at the school.
Posting on Twitter, Headteacher, Kate Smith, said: “URGENT :we have to close at 12.30 p.m. today due to electrical issues. We will follow arrangements in planners. Any problems phone/text. KSM”
The LBO has tried to contact the school to find out more.