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(Image: GOOGLE)

Cops have launched an investigation after horrifying messages were left on social media warning McAuley Catholic High School in Doncaster of a massacre.

The “potentially unauthorised and malicious post” was uploaded to Instagram, Facebook and Snapchat on Monday.

It read: “We have our sights set on you, and by Allah we will kill every single infidel student at this school #McAuleySchoolMassacre.”

(Image: McAuley Catholic High School)

School bosses moved quickly to calm parents’ fears, assuring them that police had been notified of the threat.

The school on Cantley Lane said it will remain open and told pupils not to respond to the threats on social media.

In a statement it said: “The matter that has been reported is currently being investigated by the Police.

“At this time pupils and parents are advised to not reply to any unsolicited emails or social media and to report anything of concern to the school/police.”

(Image: McAuley Catholic High School)

Cops have been drafted in to patrol the school and specialist officer will be present to give advice to parents, teachers and pupils on Tuesday.

Concerned parent Shanie Varley took her daughter, 15, out of school over the threat.

Speaking to the Yorkshire Post, she said: “The post had been seen and then sent on through Snapchat and then Facebook so all the kids knew but the parents weren’t told.

“As soon as I got off the phone with her I contacted the school, who said that police were there and that it was ‘nothing to worry about’.

“But she’s my daughter and I didn’t feel safe so I got her dad to pick her up and bring her to work with me where she’s been doing revision.”

(Image: McCauley Catholic School)

A police spokesman told the Doncaster Free Press: “We can confirm that police have received a report regarding potentially unauthorised and malicious posts made on a social media account.

“This information has now been passed to the North East Counter Terrorism Unit.”