NEW YORK - The pilot and the co-pilot were killed and two others injured after an Air Canada Express plane flying from Montreal collided with a ground vehicle upon landing at New York's LaGuardia Airport, local media reported Monday. 

The US Federal Aviation Administration issued a ground stop for all planes at the airport until 01:30 local time (0530 GMT), according to a notice from the regulator.

The notice attributed the halt to an emergency at the airport, saying that there was a high probability of an extension, without specifying any details.

The New York Fire Department said it was responding to the reported collision, but did not provide further details.