NEW YORK (WABC) -- A regional Air Canada jet collided with a Port Authority airport vehicle at LaGuardia Airport in New York City late Sunday, an on-the-ground crash that demolished the front of the airplane, killed two pilots, injured dozens of passengers and prompted the airport to shut down.
The fire truck was crossing the tarmac just before midnight after being given permission to check on another plane reporting an odor onboard. Before the collision, an air traffic controller can be heard on airport communications frantically telling the fire truck to stop.
About 40 passengers and crew members on the regional jet from Montreal, and two people from the fire truck, were taken to hospitals, some with serious injuries.
The National Transportation Safety Board is working to determine which of the airport's many layers of safety precautions failed, allowing the fire truck onto the runway.
Among the areas being explored are whether the common practice of having two controllers on duty overnight is sufficient, why the runway warning system failed to alert the possibility of a crash, who was coordinating air and ground traffic, and whether the fire truck heard the controller's last-second pleas to stop.
(ABC News and the Associated Press contributed to this report.)