The driver of the van, a man in his 20s, was seriously injured and taken by ambulance to University Hospital Kerry.

Two other occupants of the van were assessed at the scene but did not require hospital treatment.

The scene of the collision remains for examination by Garda forensic collision investigators and local traffic diversions are in place.

Gardaí are now appealing for witnesses to the collision to come forward.

In a statement, a Garda spokesman said: “Any road users with dash cam footage of the area at the time of the incident are asked to contact gardaí.

“Anyone with information is asked to contact Killarney Garda Station 064 6671160 or the Garda Confidential Line 1800 666 111.”