Flights into and out of London's Luton Airport will be suspended until at least 3pm after a fire broke out at a multi-storey car park.
Emergency services say up to 15-hundred vehicles could be damaged after the building collapsed.
Four firefighters and an airport employee were taken to hospital for smoke inhalation, but have now been discharged.
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The fire's believed to have started by a diesel vehicle.
Andrew Hopkinson's the chief fire officer at Bedfordshire Fire and Rescue Service.