A major search was mounted last night, centred on Ballincollig Regional Park on the western outskirts of Cork city, after the family of a man in his 60s contacted gardaí.
The man, who is understood to be single, is from the Ballincollig area.
Gardaí found his car in the Regional Park’s car park, at around 3.30pm.
The River Lee flows through the park and water levels were high yesterday after a day of heavy rain.
Gardaí found the missing man’s phone inside his car and concerns for his safety mounted. They launched a search of the park and the river banks, and called the Irish Coastguard helicopter from Waterford.
Up to 20 gardaí and up to 40 members of Crosshaven Coastguard using thermal cameras and torches scoured the park.
The search was called off at around 9.30pm. and gardaí are due to meet this morning to co-ordinate another search.
They will begin the search near Inniscarra Bridge at around 9am and will sweep downstream towards the city.
Supt Con Cadogan appealed for anyone who may have seen the missing man park his car — a black 11-C Mercedes 200 series — in the Regional Park yesterday to contact Ballincollig gardaí on 021 4871222.