Gardaí have appealed for witnesses to an incident involving a cyclist and a pedestrian in Dublin's Phoenix Park.

The incident happened on Chesterfield Avenue at about 8.40pm yesterday.

A man in his 50s, who was cycling on the cycle lane, was seriously injured when he was involved in a collision with a pedestrian.

He was taken to Beaumont Hospital and is said to be in a critical condition.

The pedestrian, a man in his 30s, was taken to Connolly Hospital Blanchardstown with leg and back injuries.

Any witnesses are asked to contact Cabra Garda Station on 01-6667400, the Garda Confidential Line on 1800-666-111 or any garda station.