Latest News Wires Unknown submarine invaded our territory, says Sweden

Sweden's top military official said that they do not know who owns the submarine, which triggered the country's largest mobilization since the cold war. But Stockholm plans to upgrade its naval security in response.

By , Reuters

Claudio Bresciani/TT News Agency/Reuters

Sweden has proof that a small foreign submarine was operating illegally in its waters last month, its top military officer said on Friday after a mysterious episode that triggered the country's biggest military mobilization since the cold war.