Inland Fisheries Ireland is continuing to investigate a serious fish kill on the River Glyde in Co Louth.
The IFI estimates that more than 20,000 fish have died in the incident over an approximate 25km stretch of the river.
The impacted area spans from Aclint Bridge, Co Monaghan to Lynns Weir, Castlebellingham, Co Louth.
Louth County Council say they continue to monitor the recent pollution incident in the River Glyde, they confirmed the source has been identified as agricultural discharge in Co. Monaghan which has now been stopped.