A mysterious white foam appeared overnight on the River Irwell, in Salford, England.
The UK's Environment Agency has said it has been notified and is investigating.
#TeamEA have received reports of white foam on the the River Irwell and are out on site investigating. Please remember to report Environmental Incidents to our 24/7 incident hotline 0800 807060 #incidentready— Env Agency NW (@EnvAgencyNW) November 5, 2019
Various photographs and videos have been posted on social media, showing the waterway being covered in white foam.
It’s not clear what caused the foam or where it came from.