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.
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Starting cold and dry Boxing Day. Wet and windy later.
The Met Office has issued a yellow cold weather alert and there's the risk of snow in places later on Boxing Day.
Mostly dry and bright, but chilly. Frost tonight.