Hundreds of brown trout have been killed by pollution in an Anglesey river.
More than 400 fish are dead
The Environment Agency has confirmed that more than 400 fish were killed in Afon Lligwy, near Moelfre, on the weekend.
Officers are still investigating the cause, but say that early indications suggest the pollution came from the spreading of waste on agricultural land in the Mynydd Bodafon area.
More than 100 dead fish, mainly highly-prized brown trout, were counted on a second visit to the site on Sunday.
Officers had failed to see any on their first visit on Saturday when the incident was reported.
The total has now reached more than 400 following a further count this morning.
Samples of fish have been sent for analysis and the agency's investigations are continuing as they take steps to limit any further damage.
When their investigation is complete, the fish analysed and the biological impact assessed, a report will be prepared for consideration by the agency's legal department.
The Environment Agency has a 24 hours hotline. Anyone who sees pollution, illegal tipping of waste, poaching, fish in distress or danger to the natural environment to contact them on 0800 80 70 60.