A murder investigation has been launched after four people were found dead at a house in Derbyshire.
Officers were called to a property in Chandos Crescent, Killamarsh, at 07: 25 BST on Sunday after concerns were raised about the people living there.
Police said they have arrested a man and are not looking for anyone else.
The Outwood Academy City school in Sheffield confirmed it was closed following the “tragic incident” involving three of its students.
The force asked that people “avoid speculation and allow for space at this distressing time”.
Det Ch Insp Rob Routledge, who is leading the investigation, said: “We would really like to hear from anyone who saw or heard anything suspicious in the early hours of this morning, or has any information which they think could help with our inquiries.
“No matter how small you think that information may be, please do get in touch with us.
“It is understandably a worrying time for the community, and we would like to thank them for their patience and understanding at this time. It was important to us that close relatives of those involved were informed before we could give further details about the incident.
“Residents will continue to see a large police presence in the area, and patrols are being carried out for reassurance. If you do have any concerns, please don’t hesitate to speak to them.”
North East Derbyshire MP Lee Rowley described the deaths as “terrible and hugely tragic”.
“Our condolences to the family and our thoughts are with them,” he said on Twitter.
“Killamarsh is such a lovely, close knit and warm community and I know that many residents will be shocked and worried by the news.”
“I’ve no doubt that the village will pull together at this difficult time,” he added.
One man living close by said: “I’m shocked. I think people will be devastated.”
In a statement on Twitter, Outwood Academy City school said: “It is with great sadness that the academy will be closed today.
“A tragic incident has taken place in the community involving 3 of our students. We will however be open to any students who need our support.
“Our thoughts are with all those affected by this sad news.”
The school said it was working with the police and was unable to give more information at this time.
St Giles Church in the town said it was welcoming visitors who have been affected by the “shocking events”.
In a post on Facebook it said it would provide a space for prayer and for people to light a candle for the deceased and those who are grieving.
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