A wall of a hangar collapsed early Thursday at O'Hare International Airport.
No injuries were reported, but the collapse left a huge hole in a side of the structure. Sky 5 helicopter video shows debris scattered around the base of the hangar and a flap loose on one side.
It's not clear what caused the collapse, police said.
According to the National Weather Service, a downburst occurred early Thursday over O'Hare and 70 mph winds were recorded. A downburst is a strong downdraft that causes damaging winds from a thunderstorm.
It hasn't been confirmed if weather played a role.
