Richard Dixon, director of WWF Scotland, said the news the leak had stopped was welcome, but pointed out it was the second serious leak in the North Sea in two years.
"We should be trying to give up our addiction to oil and gas, and not seeking it out in more difficult places with the risks to the environment that poses when things go wrong," he said
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Loudspeakers at the border have been switched off as a gesture of goodwill ahead of a meeting between the leaders of North and South Korea.
Liam Colgan vanished on February 10 while celebrating his brother’s stag-do in the German city.
Salah Abdeslam and an accomplice were handed the maximum sentence permissible over the incident in March 2016.