A man has been airlifted to hospital after falling on rocks and into the sea on the Co Down coast near Ardglass.
An Irish Coastguard helicopter and lifeboat crews were involved in the rescue operation close to Shepland Harbour. The man fell around 25ft, a coastguard spokesman said.
He has been taken to the Royal Victoria Hospital in Belfast.
South Down SDLP MP Margaret Ritchie said: "I would also like to pay huge tribute to the Irish Coastguard and the Belfast coastguard for their swift and decisive action and thank them for their work.
"Were it not for this cross-border effort, we might be facing a very different story and it backs up my passionate belief that we must retain strong, effective coastguard services North and South and make sure that they work in close harmony with one another."