Denmark closes investigation into Nord Stream pipeline sabotage case, and Russia criticizes the decision. Four large gas leaks were discovered in pipelines belonging to the Nord Stream project off the Danish island of Bornholm, where seismic survey institutes recorded two undersea explosions shortly before the leak.
While the lines were not in operation when the accidents occurred, they contained gas that leaked into the water and atmosphere. Several hypotheses pointed the finger at Ukraine, Russia, or the United States, although the three countries denied involvement.