Authorities say individual jumped fence at Denver International Airport in Colorado before being struck.

A person has died after jumping an airport perimeter fence in the US state of Colorado and being struck by a Frontier Airlines plane, according to authorities.

Denver International Airport said the unusual incident occurred late Friday, after the unidentified individual gained access to the tarmac.

It said the “pedestrian jumped the perimeter fence and was hit just two minutes later while crossing the runway”.

A brief engine fire followed the collision, which was put out by emergency responders, according to the airport.

It said that 12 of the 231 people on board suffered minor injuries, with five hospitalised.

The airport said investigators had examined the fenceline where the individual entered and “found it to be intact”.

It added that the struck individual “is not believed to be an employee of the airport”.

“We are extremely saddened by this incident and express our sympathies to those involved,” the airport said.

Both local authorities and the National Transportation Safety Board (NTSB) were investigating the incident.

The Frontier Airlines flight had been bound for Los Angeles International Airport.

Airport safety in the US came under renewed scrutiny earlier this year amid a prolonged shutdown of the Department of Homeland Security (DHS), which temporarily left both Transportation Security Agents (TSA) and air traffic controllers working without pay.

While instances of people being killed on airport tarmacs are rare, Friday’s incident came a day after a Delta employee was killed after an airport vehicle struck an airbridge at Orlando International Airport.

In March, two pilots were killed after an Air Canada Express plane crashed into a fire-rescue vehicle at LaGuardia Airport in New York.

About 225,000 people travel through Denver International Airport a day.