Update: Mr O'Hare has been located safe.
Mayfield Gardaí are seeking assistance from the public in locating 50-year-old Philip O'Hare, who has been missing from his home in Glouthane since 11.30pm last night.
Gardaí believe Philip is using motorcar which is a grey Audi with part registration 09-C.
He is described as being five foot 10 inches, thin build with grey hair and blue/green eyes.
It is not known what Philip was last seen wearing.
Anyone with information is asked to contact Gardaí in Mayfield on 021-4558510, the Garda Confidential Line 1800 666 111 or any Garda Station.