An investigation is under way after more than 2,250 brown trout and Atlantic salmon were found dead in a river in Co Donegal.
The State agency responsible for the protection and conservation of freshwater fish and habitat said the major fish kill incident happened in the Glenagannon River in Inishowen.
Inland Fisheries Ireland was alerted to the fish kill by a member of the public via its 24-hour confidential hotline number on Friday.
