A man in his 30s has been arrested in connection with an assault in Dundalk over the weekend.
A man in his 60s suffered serious head injuries after being assaulted in a pub on Castletown Road.
He remains in a critical condition at Our Lady of Lourdes Hospital, Drogheda.
The man in custody was arrested in the Dundalk area this afternoon.
Gardaí have appealed to anyone who was in the Castletown Road area of the town between 8.30pm and midnight last Friday, or anyone with information, to contact Dundalk Garda Station.