Gardaí are investigating a serious assault on a man in north Dublin.

It happened on Phibsborough Road shortly after 7.00pm on Monday October 7th.

A man aged in his 40s received serious head injuries and was taken to the Mater Hospital.

He has since been transferred to Beaumont Hospital, Dublin where he is in a critical condition.

Gardaí are appealing for anyone who was in Phibsborough Road between 6.00pm and 7.00pm and who may have witnessed the assault - or any motorists who may have passed through Phibsborough Road around these times and have dashcam footage - to contact them.

They can contact Mountjoy Gardaí on 01-6668-600, the Garda Confidential Line at 1800-666-111 or any Garda station.

No arrests have been made and investigations are ongoing.