An investigation into a slurry leak, which killed thousands of fish in the Penruddock area on the fringes of the Lake District, is continuing.
Members of the public reported brown water, and dead fish floating on the surface, at at Skitwath and Dacre Becks.
Environment Agency officers were sent to contain the leak, which was found to have been slurry.
Thousands of fish, including trout and salmon, died, and officers remain in the area investigating.
The Environment Agency continues to investigate a beck in Cumbria, where thousands of fish were killed by a serious pollution leak.
Members of the public raised the alarm after seeing dead fish floating on the brown water at Skitwath and Dacre Becks, near Penruddock.