"We follow with great concern the reports form the Baltic sea where we see the leakages from both the Nord Stream 1 and 2 pipelines, this is something that we monitor closely from NATO we are in close contact with NATO allies involved," Stoltenberg said in his opening remarks in a meeting of the Group of the Progressive Alliance of Socialists and Democrats in the European Parliament.
On Monday, operator Nord Stream AG reported a sharp pressure drop at one of the lines of Nord Stream 2 natural gas pipeline and at two lines of Nord Stream natural gas pipeline.
The Danish military published a video of gas leaking from Russia's Nord Stream pipeline into the Baltic Sea, while Kremlin spokesman Dmitry Peskov said that Russia is extremely concerned by this development and did not rule out the possibility of sabotage being the cause of this emergency.