The search for a man who went missing on Lough Erne on Sunday evening resumed on Monday morning.
The Royal National Lifeboat Institution (RNLI) was called to Muckross, County Fermanagh, after an incident involving a jet ski at 17:30 BST on Sunday.
One man was rescued from the water by a boat already in the area and the search began for a second man.
Police officers and a helicopter from the Irish Coastguard joined the RNLI in the search.
The RNLI had two boats involved in the operation on Sunday.
In a statement, they said: "Enniskillen and Carrybridge RNLI's inshore lifeboats and Rescue Water Craft were requested to launch following reports of a person in the water, off a jet ski in the Muckross area. Enniskillen RNLI was already on Lower Lough Erne having responded to a separate call out.
"Once on scene, the RNLI observed that one person who had swam towards the shore had been rescued by a boat that was in the area."