River Clyde foam investigated by environment agency
Experts are trying to establish why a large expanse of foam has appeared on the River Clyde in Glasgow.
The Scottish Environment Protection Agency (Sepa) said it had received a number of calls.
It is believed that the foam is coming from an overflow pipe located near the Tradeston Bridge, known locally as the Squiggly Bridge.
The foam stretches from the Broomielaw in the city centre to the Clyde Arc, known locally as the Squinty Bridge.
A statement from Sepa said: "Sepa currently has a number of officers committed to investigating the pollution incident in the River Clyde and samples will be taken for testing to determine any potential impact of the substance on the local environment.
"Efforts are also ongoing to determine the source of the pollution."