Investigators are trying to pin-point the source of the oil spill
Hundreds of a protected species of crayfish have been killed by an oil spill in a south Cumbrian river.
The Environment Agency said 300 white-clawed crayfish, were wiped out after oil got into a tributary of the River Kent, near Staveley, a week ago.
Officials were alerted by a woman who spotted oil on her dog's paws.
They are trying to identify the source of the spill and want to speak to the owner of a white van that was parked on the verge of the A591 on 24 July.
Freshwater shrimp have also been killed by the pollution.
Jim Ratcliffe, environment management team leader said: "This has had a significant impact on crayfish stocks in the tributary.
"Crayfish are a protected species and we work hard to look after them and their habitats.
"We want to work with the public, for further information about this incident."