A Frontier Airlines plane hit a person on the runway of Denver’s international airport during takeoff, sparking an engine fire and forcing passengers to evacuate, authorities said.

The plane, headed to Los Angeles, “reported striking a pedestrian during takeoff” at about 11.19pm on Friday, the Denver airport’s official X account wrote.

Neither the airport nor the airline has disclosed the person’s condition.

“We’re stopping on the runway,” the pilot of the plane involved told the control tower at one point, according to the site ATC.com. “We just hit somebody. We have an engine fire.”

The pilot told the air traffic controller they have “231 souls” on board – and that an “individual was walking across the runway”.

The air traffic controller responded that they were “rolling the trucks now” before the pilot told the tower they “have smoke in the aircraft”.

“We are going to evacuate on the runway,” the pilot added.

Frontier Airlines said in a statement that flight 4345 was the one involved in the collision – and that “smoke was reported in the cabin and the pilots aborted takeoff”. It was not clear whether the smoke was linked to the crash with the person.

The plane, an Airbus A321, “was carrying 224 passengers and seven crew members”, the airline said. “We are investigating this incident and gathering more information in coordination with the airport and other safety authorities.”

Passengers were then evacuated using slides, and the emergency crew bused them to the terminal.

Denver’s airport said the National Transportation Safety Board (NTSB) had been notified and that runway 17L – where the incident took place – will remain closed while an investigation is conducted.

Friday’s episode at Denver’s airport came one day after a Delta Airline employee died on Thursday night at Orlando’s international airport when a vehicle struck a jet bridge next to an airplane with passengers onboard, as the local news outlet WESH reported.

Meanwhile, on 3 May, a United Airlines plane arriving in Newark, New Jersey, from Venice, Italy, clipped a delivery truck and a light pole, which in turn struck a Jeep. Only the delivery truck driver was injured, but the plane was damaged extensively and the NTSB classified the case as an accident while also opening an investigation.