The air ambulance has been called to an incident close to a Suffolk town.
The helicopter landed in a park in Great Cornard near Sudbury at about 11am on Tuesday.
Paramedics were also spotted in the area.
A spokeswoman for the East Anglian Air Ambulance said: "I can confirm East Anglian Air Ambulance was tasked by helicopter to an incident near Sudbury this morning to provide enhanced pre-hospital care.”
The extent of injuries and the nature of the call out is not yet known.
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