Authorities in Cardiff are investigating a pollution incident that resulted in the deaths of hundreds of fish in a stream within a city park. The affected waterway, Roath Brook, showed signs of contamination believed to have originated from a toxic substance discharged into a surface water drain nearby.

Natural Resources Wales, the agency overseeing environmental protection in the region, indicated that the scale of pollution could be more extensive than initially suspected. While the cause remains under investigation, officials are appealing to the public for any information that could help identify those responsible.

A spokesperson for Natural Resources Wales confirmed that, despite the significant fish mortality observed, the pollution appears to have ceased. They also noted that live fish continue to be found in the brook, suggesting some aquatic life has survived the incident.

The incident has raised concerns about the environmental impact on local wildlife and the wider ecosystem in Roath Brook and adjacent areas. Authorities are working to assess the full extent of the contamination and prevent further harm to the watercourse.

No arrests or formal charges have been reported at this time as the investigation continues. Local residents are urged to report any suspicious activity near water bodies to assist officials in their efforts to address and resolve the situation.