The Sligo-based Coast Guard Helicopter R118 airlifted 10 people to hospital after they were swept out to sea while swimming off the coast of Donegal.
It happened after fifteen people got into difficulty while swimming from Magheroarty pier yesterday afternoon.
The rescue operation was coordinated by the Malin Head Coast Guard Rescue Coordination Centre, which received a number of emergency calls reporting persons in difficulty off the coast.
Also on the scene were the Tory Ferry Queen of Aran and Mulroy Coast Guard Unit.
All 15 casualties were rescued and 10 were airlifted to Letterkenny Hosiptal by R118 Coast Guard Helicopter.
A Coast Guard spokesperson said it was a very lucky outcome and thanked the public for speedily alerting the Coast Guard Rescue services.
The spokesperson also praised the helicopter crew and the staff in Malin Head for coordinating an operation with a successful outcome.