Gardaí say they are concerned for the welfare of 53-year-old Alan Donohue from Cork City.
He is described at 6ft tall, of strong build with grey receding hair and brown eyes. He was last seen wearing a tan coloured 3/4 length trench coat and dark blue jeans.
His last known whereabouts were at Henry Street in Cork City Centre on Tuesday morning at around 8.15.
Missing man Alan Donohue | Via: Garda Press
Separately, Gardaí have appealed for information on missing 48-year-old Douglas Twomey.
He was last seen at his home in the Passage West area, on Tuesday, May 3rd.
He is described as being 6 feet tall, of stocky build with blue eyes and short grey/brown hair, and was wearing a green polo shirt, blue jeans a blue hoody and blue sketchers shoes. He may be driving a Maroon coloured Hyundai Santa Fe Jeep, Registration Number 04-C-6768.
Missing man Dougla Twomey| Via: Garda Press
Anyone with information is asked to contact the Garda Confidential Line on 1800 666111 or any Garda Station.