LaGuardia Airport in New York City was temporarily closed late Sunday night after an Air Canada Express aircraft collided with a ground vehicle on the runway, prompting emergency response and a ground stop issued by the FAA. The New York Fire Department and Police Department responded to the incident, with the ground vehicle likely belonging to the Port Authority, though no details on injuries have been released. The National Transportation Safety Board is investigating the collision, and the airport experienced disruptions while authorities continue to gather information.