RSPCA officers frantically work to help sea birds that have been washing up on Dorset's coast. More than 100 have been covered in a greasy substance - but experts say it isn't fuel.
Manager of RSPCA West Hatch Peter Venn said: "We do not know what this substance is or where it has come from yet but we do know it is not fuel. It may be bi-product from manufacture, but at this stage we just do not know."
It could be days before the true scale of the pollution spill affecting sea birds on the south coast is known, wildlife experts said today.
A change in wind direction could have killed thousands more birds after scores were found washed ashore along England's south coast.
Increasing numbers of birds are washing up on the south coast after being covered in a mysterious substance.