Frontier Airlines aircraft hits and kills a man on the track during takeoff

The crash caused a brief engine fire, which the Denver Fire Department quickly extinguished, announced in a statement.

Smoke could be seen in the cabin, and all 224 people on board were later evacuated, reports BBC, broadcast Periscope.

We are deeply saddened by this"event, Frontier said.

Transport Secretary Sean Duffy said the plane was moving with a <x0-speed high"at the time.

Later, a person who violated the law violated the airport's security at Denver International Airport deliberately climbed into a perimeter fence and ran on track", Duffy said in a statement.

"No one should ever enter an airport without permission, he added.

The person is not believed to be airport employees and has not been identified.

Twelve passengers on the plane reported slight injuries from the incident, five of which were sent to nearby hospitals.

The pool is closed while the Federal Aviation Administration and the National Transport Safety Board are investigating. /Periscope