Emma Pattison, the headteacher of Epsom College has been found dead at the school alongside her seven-year-old daughter and husband.
Emma Pattinson, 45, and her husband George, 39, were found dead alongside her seven-year-old daughter, Lettie after police were called to the area around 1am on Sunday.
How Emma Pattison died is not yet known but police believe the deaths are an isolated incident with no third-party involvement.
Detective Chief Inspector Kimball Edey said: “On behalf of Surrey Police, my team, and I, I first want to express my sincerest condolences to the friends and family of Emma, Lettie and George, as well as to the students and staff of Epsom College, for their tragic loss.
“I want to give my assurance that we will conduct a thorough investigation into what took place last night, and hope to be able to bring some peace in these traumatic circumstances.
“I would ask that their privacy is respected at this very difficult time.”
Inspector Jon Vale, Epsom and Ewell’s Borough Commander, said: “We’re aware that this tragic incident will have caused concern and upset in the local community.
“While this is believed to be an isolated incident, in the coming days, our local officers will remain in the area to offer reassurance to students, parents, teachers, and the local community.
“I would like to thank the school and the community for their understanding and patience while the investigation continues.”
The three deaths have been reported to the coroner.