The International Energy Agency’s (IEA) Fatih Birol said on Thursday that it was “quite clear” who was behind the suspected sabotage of the Nord Stream pipelines, which caused huge leaks into the Baltic Sea.

“It is not yet known who made it, who is behind this sabotage, there is still some debate, but (…) it is pretty clear (…) who was behind this issue,” he said at a renewable energy conference in Paris.

The Nord Stream pipelines have been flashpoints in an escalating energy war between capitals in Europe and Moscow that has damaged major Western economies and sent gas prices soaring.