Three young men are in hospital with life threatening injuries, after being stabbed at a party on the Bedfordshire Cambridgeshire border.
Four people were attacked during the incident at the village of Begwary, near St Neots, in the early hours of Sunday morning.
ITV Anglia spoke to Jo Hobbs from Bedfordshire Police.
More top news
Police have released CCTV of people who were caught urinating in a Hitchin alleyway - in the hope that the public will help identify them.
After a cool start to the day, many places will enjoy some warm sunshine this afternoon. However, sharp showers will develop in places.
An inquest has been hearing how a butcher from Suffolk, killed his estranged wife with an axe before jumping to his death from a car park.