Gardaí say their investigations are ongoing.
Gardai in Dublin have launched an appeal for witnesses after a man in his 60s was found in a critical condition in Swords.
He was discovered at about 2.30pm yesterday afternoon.
The man was found with serious injuries on a walkway beside the Malahide Road Roundabout.
He's been taken to Beaumont Hospital for treatment where he remains in a critical condition.
Gardai have asked anyone who was in the area between 1pm and 2pm yesterday to come forward.
They're also keen to see any video or dash cam footage from that part of Swords.

Further Increase Expected In Number Of Landlords Leaving Property Market, As Price Of Three-Bed Semi Rises In Kildare
Over 1,700 Garda Checkpoints In Operation Over Christmas Period, With Naas RPU Detecting Multiple Speeding Motorists
€1.2m Approved For Zipline And High Ropes Adventure Centre At Donadea
Christmas Appeal To Adopt Dogs As Euthanasia Figures Rise
Speed Enforcement To Increase In Kildare With 21 New Camera Zones To Be Rolled Out In January
Over 400 Motorists Caught Speeding So Far Today, Including A Driver In Kilcock
Transport Minister In Discussions With Irish Rail About Extending Late-Night Trains Beyond Christmas
Tadhg And Mary Should Be Looking Forward To Christmas, Say Gardai As Fresh Appeal Launched