The Nordic country has opened an investigation into the damage, just weeks after NATO stepped up its military presence in the area following a series of similar incidents.

Swedish authorities boarded a vessel suspected of being involved in an earlier underwater sabotage of cables in the Baltic Sea on Monday.

In recent years, NATO has been facing an increasing number of sabotage attacks within its member countries, and one of the most shocking incidents involves threats to assassinate Armin Papperger, the CEO of Rheinmetall,

Sabotage acts in NATO countries in recent years have included threats to assassinate weapons industry leaders, particularly the German arms maker Rheinmetall's CEO Armin Papperger, NATO's Deputy Assistant Secretary-General James Appathurai said on Jan.