This is terrifying. A 40-year-old woman was arrested on the afternoon of Wednesday, Sept. 13 for reportedly trying to break into Prince George‘s London school, Thomas’s Battersea, while the royal was in class. According to the Daily Mail, police were called after the unidentified woman gained access to the school’s premises. She was later taken to a south London police station where she remains in custody.

“We are working with the school, which is attended by His Royal Highness Prince George, to review its security arrangements after the incident. Police were alerted and officers attended immediately after the issue came to light,” a Metropolitan Police spokesperson said in a statement. “Police are part of the protective security arrangements for the prince and we will continue to work closely with the school, which is responsible for building security on its site.”

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George on his first day of school. (Photo Credit: Getty Images)

“We are aware of the incident but cannot comment any further,” a Kensington Palace spokesperson told the Daily Mail following the news. The break-in comes just days after a royal fan publicly expressed her concern about the security at George’s school. Sarah Burnett-Moore, 54, recently told The Daily Telegraph that she filmed herself walking “freely” into the school without anyone stopping her.

“I could have walked in with an IED and set it to go off on [George’s first day of school]. I live just 200 meters from the school, and myself and lots of neighbors are worried about the security implications as the prince’s presence will make the area a target for attacks.” At the time, the school was closed for the summer, but Sarah still couldn’t believe how easy it was to make her way onto the premises.

In an announcement in March, Kensington Palace confirmed George, 4, would be attending Thomas’s Battersea School in London this fall. “Their Royal Highnesses are delighted to have found a school where they are confident George will have a happy and successful start to his education,” the palace said in a statement.

The school is one of four family-run schools in London and despite the school boasting a location just a stone’s throw from their royal residence, George’s parents, Prince William and Kate Middleton, have opted for the middle-class, south west London branch. The $8,300-per-term school currently has 544 day pupils, aged between four and 13.

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George on his first day of school. (Photo Credit: Getty Images)

Upholding a set of core values — kindness, courtesy, confidence, humility, and learning to be givers, not takers — the elite school holds an impressive record of senior school entrance and scholarship successes. In fact, the Tatler Schools Guide says the “cream of the Battersea crop rises to the likes of Eton and Wycombe Abbey.” The school’s extensive grounds also include a kindergarten, which Princess Charlotte, 2, is later expected to attend.

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Part of this post was written by Holly Royce and originally appeared on our sister site, Now to Love.