MORE than 2,000 fish have died following a pollution incident on a river that feeds into the Wye.
Wales’ environment body Natural Resources Wales (NRW) is investigating how the afon Llynfi, a tributary of the river Wye, near Three Cocks was polluted.
The body said it has now concluded its assessment and following further information is now widening its investigation. It is appealing for information or witnesses to help it trace the source of the pollution.
Two officers were sent to investigate on Saturday evening to look for signs of pollution and attempt to find the cause of the significant loss of fish.
The agency is appealing for information following the pollution incident which it said would have occurred between Tuesday, June 28 and Saturday, July 2.
An ongoing assessment of the impact of the incident had reported hundreds of fish killed, which includes brown trout and bullheads.
Steve Morgan, south east operations manager for NRW, said: "Our rivers provide a home to rich, diverse and valuable species of plants and animals so it’s important to deal with pollution as quickly as possible.
"Our investigations into how this incident happened are ongoing.
"If you have any information about the incident please report it to our incident hotline on 0800 807060."
A NRW spokesman said officers had visited the river everyday since Saturday and believe most of the pollution has been dispersed downstream and said some of the dead fish have been found among live fish. He said the water quality is back to normal and the ecology of the river will begin its natural process of recovery.