A man has suffered serious injuries after an "incident" involving a vehicle at a multi-storey car park at London Luton Airport, police said.
The BBC understands the car involved had fallen from a higher level of the car park.
Emergency services were called to the car park on the airport complex shortly before 11:00 BST.
Bedfordshire Police said their officers, ambulance and fire crews were still on the scene.
The force urged any witnesses to contact them.
The incident happened at Car Park One, Luton Airport confirmed.
An airport spokesperson said "one person has been taken to hospital for further assessment" and airport staff were managing the vehicles leaving the site.
"Arriving vehicles are being redirected to the airport's mid-stay car park until further notice," they said in a statement.
"There is no disruption to wider airport operations."
The East of England Ambulance Service said it sent a number of crews to the site.
"An ambulance, an ambulance officer vehicle, a rapid response vehicle, the Hazardous Area Response Team and the Beds and Herts Critical Care Scheme were sent to the scene," a spokesman said.