Dog walkers are being urged to take care as a substance dangerous to dogs is washing up on beaches across the county.

The white oily material, believed to be palm, washed up over the weekend.

Palm oil can be fatal to dogs if ingested and but is not harmful to humans.

The Argus: Shoreham Harbour beach pollution.  Picture: Gerald Legg  

A spokesman for the Maritime and Coastguard Agency said: "We are currently investigating the origins of this material that is washing up on the beaches. Past incidents have shown it is likely to be residues from a vessel that has cleaned its tanks after discharging its cargo.

"Previous incidents have indicated that this type of substance could be harmful to dogs and we would ask the public to stay away from the areas of Folkestone and Worthing beaches where it has been reported.

"It is recommended to keep your dogs within sight, preferably on leads, and if you do see a whitish sponge like substance in appearance that looks out of place on the beach then please report it to HM Coastguard."

The Argus: Pollution on the beach at Widewater Lagoon, Lancing. Picture: Gerald LeggPollution on the beach at Widewater Lagoon, Lancing. Picture: Gerald Legg Beach pollution at Widewater Lagoon, Lancing.  Picture: Gerald Legg