MIAMI — The five people killed when an Amazon cargo jet ran off a runway at Miami International Airport were inside a van carrying seven people from a cleaning company and in an SUV hit outside of airport property, the head of the National Transportation Safety Board said Monday.

NTSB chairwoman Jennifer Homendy didn’t detail how many people were killed in the van or in the SUV in the crash on Sunday. She called the scene of the crash “utter devastation.”

Homendy walked the route the Boeing 767 followed, noting tire marks from the pavement into the grass, the destroyed van carrying the cleaning crew, torn fencing, navigational equipment and the crushed SUV outside airport property.

The debris included vehicle air bags, equipment from the vehicles, the airplane and the airport, and “fencing everywhere,” Homendy said. The van with seven people inside was “torn apart. It certainly must have been devastating,” she said. The van was owned by Professional Ocean Service Corp., an airline cleaning contractor.

Homendy said the NTSB would issue more information on Tuesday, including possibly information on speed that is confirmed by the flight data recorder.

Federal investigators examining the crash spent Monday determining whether the plane touched down too late to stop safely.

Video of Sunday’s landing appears to show the Boeing 767 remaining airborne well down the runway before touching down. Aviation experts said investigators will seek to determine exactly where the plane landed, whether it was beyond the normal touchdown zone, and why the pilots did not abandon the landing.

Investigators will also examine the plane’s speed and braking, weather and wind conditions, the aircraft’s mechanical condition and other factors that could have contributed to the deadly overrun.

The aircraft on Sunday flew from Cincinnati to Miami and then to San Juan, Puerto Rico. It was returning to Miami when it overran the runway around 2 p.m. and plowed across a road used by warehouse workers and other businesses that surround the airport. Aside from the five who died, three people were critically injured and two others were hospitalized with less severe injuries, officials said.

The crash, which sent thick black smoke billowing into the sky, trapped the pilot and copilot in the cockpit and some occupants in cars, said Miami-Dade Fire Rescue Chief Ray Jadallah. The agency said crews also had to extricate a person who was trapped under a vehicle.

The typical landing zone for a plane is within the first 3,000 feet of a runway, experts said. If the cargo jet was beyond that area, it should have aborted the landing and gone around for another try, aviation safety expert Steve Arroyo said.

Mary Schiavo, who is a pilot and former inspector general of the Transportation Department, said video posted online shows the Amazon plane floating above the runway for an extended period without flaring the nose upward to force the main landing gear onto the ground.

It wasn’t raining at the time, but dark storm clouds loomed and strong winds were reported. Schiavo said that if the plane had a tail wind, that could have contributed to it floating further down the runway.

The Miami airport is not equipped with arresting systems that the FAA says have been installed at more than 120 airports nationwide to safely stop planes that do go past the end of a runway. Those beds of lightweight, crushable material at the end of a runway have been credited by the FAA with helping save at least 497 lives aboard planes that overran runways.

Miami’s airport appears to be in compliance and wasn’t required to have an arresting system because it has a 1,000-foot safety buffer at the end of its runways, said Mike O’Donnell, the FAA’s former director of airport safety and accident investigations.

The Prime Air plane came to rest beside a roadway near two semitrucks, images showed. The aircraft appeared to be resting on its belly and was largely intact despite the fire.

The flight had been operated by 21 Air, a cargo carrier based in North Carolina. The 32-year-old Boeing 767 was originally built to carry passengers and flew for several airlines for more than two decades before being converted to a cargo plane in 2015, according to flight-tracking site Flightradar24.Schiavo said the NTSB will also closely examine the maintenance history of this plane — particularly since it has a history of foreign ownership, including by a Russian company.

The crash halted flights at the busy travel hub for much of Sunday afternoon and continued to hamper air travel into Monday.

Miami International Airport said that two of its four runways remained closed Monday and that operations were to be affected throughout the day because of aircraft and flight crews not arriving there due to Sunday’s cancellations after the crash.

An airport spokesperson said there were 160 cancellations and more than 300 delayed flights Sunday, plus another 69 canceled flights Monday through mid-afternoon. Flight tracking sites were reporting widespread delays at the airport.

Amazon said in a statement that it would cooperate with any investigation.

“We’re heartbroken to learn that five people lost their lives in today’s incident at Miami International Airport,” the company said. “Our deepest sympathies go out to the families, loved ones, and all those affected by this devastating loss.”

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