A teenager has been arrested by Gardaí investigating a serious hit-and-run in Cork city.

The two-and-a-half-year-old boy was struck by a car which failed to stop at Castle Meadows off Skehard Road, shortly before 4.00pm on Monday.

The boy is described as critical but stable at Temple Street Children's University Hospital in Dublin.

Gardaí have also recovered a blue saloon car believed to have been involved in his incident.

It was recovered approximately 1km from the scene of the collision.

The teenager is being held under section four of the Criminal Justice Act at Bridewell Garda station.

Gardaí are renewing their appeal, and asking that anyone who may have witnessed the incident or who have any information to contact them.

Gardaí believe there were a number of people in the car at the time of the incident, and would appeal to the passengers to come forward.

Anyone with information - or who may have dash cam footage - is asked to contact Anglesea Street Garda Station on 021-452-2000, the Garda Confidential Line at 1800-666-111 or any Garda Station.

Additional reporting: Jack Quann