A post mortem is due to be carried out on the body of a man whose body was recovered from the River Shannon above Portumna bridge on Tuesday.
It is understood the man was swimming with friends at Ballyegan around 6pm when he got into difficulties.
The area is a popular swimming spot.
His body was recovered at around 10pm at Cappafallagh and brought to Portiuncla Hospital in Ballinalsoe, where the post mortem is due to be carried out this Wednesday. The local coroner has been notified.
The man's name has not been released.
The operation involved Killaloe Coast Guard, Ballina Search and Rescue and the Coast Guard helicopter from Shannon.
Meanwhile, Lough Derg RNLI was also asked to attend a casualty care incident at Terryglass the same evening.
It is believed a local man died from a suspected heart attack after he had been in the water.
It is unclear if he suffered the fatal attack while in the water or shortly after he came out of the lake. However, his death is not being treated as a drowning. The local coroner has been notified.
The man has been named locally and is said to have swam in Lough Derg on a daily basis.