An air ambulance was spotted landing in a Linslade field near Greenleas Lower School, as it rushed its crew to a male casualty.
The incident happened on Saturday, May 18, and the patient was taken to a specialist hospital.
One eyewitness said: "An air ambulance landed in the park next to Greenleas Lower School. I would like to find out the person's welfare.
"It was horrible. It would be a real comfort to know his condition; it was horrible to witness."
A spokesman for Essex and Herts Air Ambulance, said: “On May 18 an Essex and Herts Air Ambulance was tasked to assist EEAST and Bedfordshire Constabulary with a male patient medical emergency.
"Teams worked together on scene to optimise patient outcome. The patient was transferred to a specialist hospital for ongoing treatment.”
The LBO has contacted the East of England Ambulance Service Trust to ask for an update about the patient.
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