*More than 300 birds, dead and alive, have washed up over the past several days.
*The Environment Agency says the birds have been contaminated by a 'refined mineral-based oil mixture'. But there is no suggestion yet where it has come from.
*The birds started being washed up on Wednesday and the situation has been getting worse.
*Members of the public are urged to stay away and leave the experts to deal with injured birds.
*The rescue operation will continue at Portland today. Keep logged on to dorsetecho.co.uk for all of the latest updates.
*If you have any pictures or videos, email them to email@example.com or call 01305 830999.