A teenager remains in a serious condition in hospital after getting into difficulty in a north Monaghan lake yesterday.
The 15-year-old was airlifted to hospital following the incident at Hollywood Lake.
Access to the lake was closed yesterday, but it has since re-opened.
It comes in the wake of several tragic drownings in the region and across the country.
Three local people died in separate incidents last week, and there have been five deaths in Irish waters in the past five days.
In an online post, Castleblayney councillor Aoife McCooey appealed "to everyone to exercise extreme caution when going swimming at lakes or at the seaside".