Armed police are investigating what is being described as a "serious incident" at a travellers' site in Peterborough.
Three people have been injured, two of them seriously.
All three have been taken to hospital.
ITV Anglia has more
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Cold with some icy stretches to start. There will be sunny intervals and further blustery, wintry showers.
Early wintry showers will clear to give a mostly dry day with some sunny spells.
Scattered wintry showers will continue overnight. Clear spells will allow a frost to develop by morning.