4 January 2012 Last updated at 12:22
Dead seabirds covered in oil have been found washed up along the Western Isles’ coast.
The bodies of about 12 guillemots have been recovered since Sunday on Benbecula, Harris and Taransay.
British Divers Marine Life Rescue (BDMLR), which has been monitoring the finds, said the source of the oil was not known at this stage.
It has also raised concerns that other species of seabirds, such as gannet, could be affected by the pollution.