An investigation has been launched after more than 2,250 brown trout and Atlantic salmon were found dead in a river in County Donegal, Republic of Ireland.
The state agency responsible for protecting and conserving freshwater fish and their habitat said the incident happened in the Glenagannon River in Inishowen.
On Friday, Inland Fisheries Ireland was alerted to the major fish kill incident by a member of the public via their confidential 24-hour helpline number.
He confirmed that more than 2,250 brown trout and juvenile Atlantic salmon had been killed.
The fish kill area covered approximately four kilometers of the river and included several age classes of fish.
Inland Fisheries Ireland said it was following a “defined line of inquiry” to determine the cause, which could result in legal action being taken.
Its North West River Basin District Manager, Milton Matthews, thanked the person who alerted them to the incident quickly.
“This allowed our environmental team in Letterkenny to launch our investigations without delay,” he said.
“This can be critical in identifying and confirming the underlying cause of fish kill incidents such as this on the Glenagannon River.”