Investigation after thousands of fish killed
An investigation has been launched after thousands of fish were killed in a north Wales stream.
Natural Resources Wales says up to 3,000 fish are believed to have been killed on a mile long stretch of the Nant Mawr between Ruthin and Denbigh.
The incident is believed to have been caused by a blockage in the river. This has now been removed and river levels are expected to return to normal shortly.
Nant Mawr is a tributary of the Clywedog which feeds the River Clwyd.
People are asked not to touch the carcasses and allow them to be washed away naturally.