Video shows flames coming from Frontier Airlines flight after ‘hard’ emergency landing

A trail of flames can be seen on video shooting from underneath a Frontier Airlines flight as it lands on a runway in Las Vegas in an incident being investigated by federal officials.

Flight 1326 from San Diego made a hard landing at Harry Reid International Airport on Oct. 5 after "the pilots detected smoke and declared an emergency," Frontier said in a statement to NBC News .

Cell phone video showed fire and black smoke billowing from underneath the Airbus 321 plane. Investigators say the flight crew made an emergency hard landing after reporting smoke in the cockpit, according to the Federal Aviation Administration.

Passengers Lucas Shook and Alondra Soto told NBC News correspondent Maggie Vespa on TODAY Monday that they felt severe turbulence as the plane dropped multiple times like a roller coaster as it approached the runway. They then saw smoke outside their windows upon landing and said all four of the plane's tires were blown out.

"It just like if you just were sitting down in a chair and you drop five feet down and you could feel it," Shook said. "Both of our backs are in pain a little bit."

"And we landed, and it was so hard," he continued. "I felt it through my body, and she felt it, too."

"I was very scared," Soto said.

Radio traffic indicates that the crew went silent while approaching the runway.

"Red Dog 40, we have no communication with the pilot whatsoever," air-traffic controllers can be heard saying. "His radios are out. We have no communication with the pilot."

Passengers and crew were evacuated by firefighters using airstairs after the plane landed safely. They were then taken by bus to the terminal. No injuries were reported, airline and airport officials said.

The FAA and National Transportation Safety Board are investigating the cause of the incident.

"This is a very serious situation," NBC News aviation analyst Jeff Guzzetti, a former FAA accident investigator, said on TODAY on Oct. 7.

"This crew had a very serious emergency going on with smoke in the cockpit that degraded their ability to communicate with air traffic control."

Soto and Shook told Vespa that Frontier offered them a $200 voucher to be used within three months, which left them frustrated.

However, Frontier told NBC News that all customers were additionally being refunded for their flight.