An investigation has been launched after more than 4,500 fish were found dead along a stretch of river in Co. Cavan. Inland Fisheries Ireland (IFI) said officers discovered the dead fish over a two-kilometre section of the Cavan Town River after receiving a report through its confidential hotline late on Tuesday night. Pic: ShutterstockIFI is leading a multi-agency investigation under the national protocol for significant fish kills, working alongside Cavan County Council, the Environmental Protection Agency, the Marine Institute and the National Parks and Wildlife Service. An interagency group met on Wednesday to coordinate the investigation as efforts continue to establish the cause of the ecological incident. Inland Fisheries Ireland is appealing to anyone with information relating to the incident, or to fish kills, water pollution, habitat destruction or illegal fishing, to contact its confidential 24-hour hotline on 0818 34 74 24.