New Delhi, March 24 -- A jet landing at New York City's LaGuardia Airport collided with a fire truck on the runway, killing the pilot and copilot and injuring several others. Here's what you need to know:

What happened?

The crash occurred around 11:45 p.m. on Sunday when an Air Canada regional jet arriving from Montreal struck an airport fire truck traveling across the runway to respond to a separate incident aboard another plane.

According to air traffic control audio, the pilot of that other plane - United Flight 2384 - reported a "weird odor" was causing flight attendants to feel ill while the plane was waiting to take off. The pilot declared an emergency and requested to return to a gate and for firefighters to respond.

Audio reco...