A murder investigation has begun following the discovery of a man's body in Dublin yesterday evening.

65-year-old Christopher Hall was found by his daughter with serious head and body injuries in a downstairs room of his home at Dún Saithne Green in Balbriggan.

A post-mortem examination is underway but detectives believe the man was the victim of an attack.

They suspect he may have known his killer and could have unwittingly allowed them into his home.

A forensic examination of the scene is continuing and there are no indications of a break-in or burglary.

The discovery was made at the man's home yesterday (Pic: RollingNews.ie)

The victim was a father to two adult daughters and was known in the area as a quiet man who lived alone.

Neighbours say he had a fall last year and hit his head, but still went out and about and was always friendly.

Gardaí in Balbriggan are seeking and examining CCTV footage and carrying out house-to-house inquiries in the Dún Saithne estate.

They do not believe the murder was a random attack and are following a number of lines of inquiry.

There were no indications of a break-in or burglary.

Gardaí suspect the victim may have known his killer, and as a vulnerable person could have unwittingly allowed the person into his home.

Superintendent Paul Franey said a murder investigation has been launched and a senior investigating officer has been appointed.

Speaking at a media briefing this afternoon, he said an incident room has been set up at Balbriggan Garda Station.

"A family liaison officer has been provided to Christopher's family, and An Garda Síochána continue to keep the family informed," Supt Franey said.

"I am appealing for privacy for the family at this time."

He appealed to anyone who was in the Dún Saithne Green, Crescent or wider area between 8pm on Tuesday and 2pm yesterday who saw anything of interest to contact Balbriggan Garda Station.

He also appealed to people who may have CCTV or dash-cam footage to come forward.

Balbriggan Garda Station can be reached on 01-6664500, while the Garda Confidential Line is 1800 666.