A father and son were rushed to hospital after a helicopter crashed in a garden in the foothills of the Cooley mountains in Co Louth.
The two men, named locally as Donnie and Dustin Marron, had to be cut from the Robinson R-44 Clipper after emergency services rushed to the scene shortly after 5pm yesterday.
The crash happened at the South Commons near Carlingford, Co Louth.
The impact resulted in part of the front of the helicopter coming away and the men were left strapped into their seats.
Emergency services were forced to cut the two men from the helicopter.
Donnie Marron, in his 70s, was airlifted to Beaumont Hospital by the Irish Coastguard where he was being treated for his injuries last night. He is believed to be in a serious condition.
Dustin Marron, in his 40s, was brought by road to Our Lady of Lourdes Hospital, Drogheda, by ambulance.
His injuries are not believed to be life-threatening.
Emergency services including the fire brigade, Doonore Coastguard Unit and an ambulance crew attended the crash.
"Gardaí at Dundalk along with other emergency services attended the scene of a helicopter crash at Carlingford, Co Louth," a Garda spokeswoman said.
"A helicopter crash landed in a garden.
"The pilot and passenger - both men, in their early 70s and mid-40s - were removed from the scene.
"One man was airlifted to Beaumont Hospital and is in a serious condition and the second man was taken to Our Lady of Lourdes Hospital, Drogheda.
"The Air Navigation Investigation Unit has been notified. Investigations are continuing."
Mark, a neighbour of the men who did not want to publish his second name, rushed to the scene to help.
He told Independent.ie: "I was first on the scene after I saw what happened, I drove straight up in the car and then another woman came along. They were in a bad way, to be honest. It's unusual talking about it because it was so hard and difficult to see.
"Donnie would be well known within the community so it was a real shock."
Local woman Anne McCardle said: "I heard a helicopter above and thought nothing of it, so I'm shocked.
"Donnie is a great fellow and usually he'd be in Spain this time of year so this is really unfortunate. He does play music down the local pub in Carlingford and is well known within the community."
The family had been involved in running a pub in Carlingford village in the past.
The investigation into what happened will be led by the Air Accident Investigation Unit in the Department of Transport, Tourism and Sport.
Donnie Marron's brother, Kevin Marron, died in the Beaujolais crash of November 1984.
The 'Sunday World' columnist was on the plane which crashed near Eastbourne in England while it was travelling to France.
'Evening Herald' editor Niall Hanley, 'Evening Herald' columnist John Feeney and Irish Independent columnist Tony Hennigan were among the nine people who died in that disaster.