A Bulgarian ship has been released after Swedish authorities cleared it of deliberately sabotaging an underwater cable in the Baltic Sea. NATO has moved to protect Baltic Sea cables amid concerns of Russian tampering.

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.

Swedish prosecutors on Monday ruled out sabotage in the case of a damaged Baltic Sea fibre-optic cable and said they were releasing a Bulgarian ship seized..

Norwegian police seized a Russian-crewed ship on suspicion of being involved in causing “serious damage” to a fiber cable in the Baltic Sea between Latvia and Sweden.

Swedish authorities have seized a ship suspected of damaging a data cable running under the Baltic Sea to Latvia. Prosecutors said an initial investigation pointed to sabotage, and an inquiry has been launched involving Sweden's police, military, and coast guard.

Swedish authorities have seized a ship over the “aggravated sabotage” of an undersea fibre-optic cable linking Latvia with a strategically important island in Sweden.

Swedish prosecutors have decided to release a vessel belonging to a Bulgarian shipping company after ruling out initial suspicions that sabotage caused damage to an undersea fiber-optic cable between