Gardaí and search and rescue units are searching for a Co Tipperary man who fell overboard from a passenger boat on Lough Derg on Saturday night.
The man in his 30s fell overboard from a pleasure craft north of Killaloe just before 7pm on Saturday. It is believed he was not wearing a life jacket.
Three teams of divers were involved in searching Lough Derg yesterday and the search resumed at first light this morning.
Local people and gardaí have been searching the shoreline.