Traces of residue from explosives have been found near the damaged undersea Nord Stream gas pipelines, seeming to confirm reports that it had been sabotaged.
In September, Denmark's energy agency reported the 760-mile Nord Stream 1 pipeline and Nord Stream 2, which run from Russia to Germany via the Baltic Sea, had ruptured.
At the time, the EU claimed the major leaks were acts of sabotage, and vowed a "robust and united response".
