An Air Canada regional jet struck a fire truck on the runway after landing at New York’s LaGuardia Airport late Sunday night, crushing the nose of the plane, according to authorities and photos of the wreckage.

Two people were killed, according to a person familiar with the investigation into the crash. The person spoke to The Associated Press on condition of anonymity because they were not authorized to discuss an active investigation.

Two Port Authority employees who were traveling in the fire truck also were injured, the person said.

There were 72 passengers and four crew members aboard the aircraft, a Jazz Aviation flight operating on behalf of Air Canada, according to a statement from the airline. The flight originated at Montréal-Pierre Elliott Trudeau International Airport, the major airport serving Montreal.

The Port Authority of New York and New Jersey said in a statement that the jet had struck a rescue and firefighting vehicle that was responding to a separate incident at about 11:45 p.m. The airport was closed as of 3 a.m. to facilitate the investigation, officials said.

Photos and videos from the scene showed severe damage to the front of the aircraft, with cables and debris hanging from a mangled cockpit. Nearby, a damaged emergency vehicle lay on its side.

Stairways used to evacuate passengers from aircraft were pushed up to the emergency exits on the jet, a Bombardier CRJ. The impact left the jet with its crumpled nose tilted upward.

In the moments before the crash, an air traffic controller could be heard on a radio transmission giving clearance to a vehicle to cross part of the tarmac, then trying to stop it.

“Stop, Truck 1. Stop,” the transmission says. The controller can then be heard frantically diverting incoming aircraft from landing.

Jazz Aviation issued a statement confirming the accident and noting the passenger and crew list was preliminary and subject to confirmation.

The National Transportation Safety Board said it was investigating the incident.