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An Air Ambulance was spotted landing near Tesco Express following a medical incident yesterday.
Onlookers saw the chopper land to help with a situation at nearby Truro Road, Gravesend.
Eyewitness, Honey-Lou Lee, said: "Something happened at Truro road.
"We followed the ambulance round to the helicopter. It was there for around 45 minutes."
Police spokesman, Steve Knight, said: "Police was called at 5.13pm on Saturday to assist South East Coast Ambulance Service with a medical incident.
"No offences were reported."
The ambulance service has been contacted for further information.