NATO allies met on Dec. 30 to address the security of critical infrastructure in the Baltic Sea, following damage to undersea cables connecting Estonia and Finland several days earlier.

A Russia-linked tanker suspected of cutting Baltic Sea cables has been tugged to port amid reports it was loaded with “spy equipment”.

NATO said on Friday it would boost its presence in the Baltic Sea after the suspected sabotage this week of an undersea power cable and four internet lines, while alliance member Estonia launched a naval operation to guard a parallel electricity link.

Eagle S is being held on suspicion of causing damage to an undersea power line and four telecoms cables by dragging its anchor