Luton Airport car park fire causes flight cancellations, delays for thousands

Fire started in diesel vehicle in Terminal 2 parking garage Tuesday night and quickly spread, injuring 5.
Blaze caused partial collapse of structure; up to 1,500 vehicles potentially damaged.
All flights suspended until Wednesday afternoon as firefighters battled flames.
Around 25,000 passengers impacted by cancellations; some diverted to other airports.
Investigation underway into exact cause; no evidence fire was intentionally set.