A father and son had to be cut from a helicopter and rushed to hospital after it crashed in a garden at the foot of the Carlingford Mountains.
Emergency services were called to the scene at South Commons, Co Louth, shortly after 5.15pm yesterday.
The two men, named locally as Donnie and Dustin Marron, were found trapped at the front of the four passenger Robinson R-44 clipper. Donnie Marron, who is in his 70s, was airlifted to Beaumont Hospital by the Irish Coastguard and his condition is described as serious. Dustin was taken by ambulance to hospital in Drogheda where it is believed his injuries are not life-threatening.
A neighbour who rushed to help said: "They were in a bad way to be honest. It was so hard and difficult to see."
Donnie Marron is the brother of Kevin Marron, a 'Sunday World' writer who died in the Beaujolais air disaster of 1984.