A growing gas cloud from a leak at a platform operated by Total off Scotland has forced Shell to remove some workers from two nearby rigs for safety reasons.
The gas leak on a rig operated by the French firm began on Sunday and has formed a cloud dense enough to be seen by workers on other North Sea rigs.
Total said it was unable to predict when or how the leak would be contained.
"The gas leak at the Elgin well head platform remains ongoing, and we are taking all possible measures to try to identify the source and cause of the leak and to bring it under control," Total UK said in a statement on Monday.
A Total spokesman said company technical teams were investigating the cause of the gas leak but declined to give further details.
City A.M. Reporter