The report comes amid warnings from the German navy that the alliance is being "tested" by foreign adversaries.

The Baltic Sea has also been the site of multiple suspected sabotage attacks recently, most notably the suspected severing of ...

Russia accuses Ukraine of planning a provocation to drag NATO into war, alleging Kyiv intends to stage a ship explosion in the Baltic Sea using Russian naval mines to blame Moscow. Russia warns that ...

NATO has launched a naval mission aimed at protecting undersea infrastructure, cables and pipelines which Nordic and Baltic governments believe have become targets of sabotage, likely by Russia.