Finland says cannot confirm presence of submarine in April

Finnish Border Guard boats patrol the waters near Helsinki on April 28, 2015. The Finnish Border Guard said on Thursday, May 28, that it had not been able to confirm the presence of a suspected submarine near Helsinki last month. -- PHOTO: REUTE
Finnish Border Guard boats patrol the waters near Helsinki on April 28, 2015. The Finnish Border Guard said on Thursday, May 28, that it had not been able to confirm the presence of a suspected submarine near Helsinki last month. -- PHOTO: REUTERS

HELSINKI (REUTERS) - The Finnish Border Guard said on Thursday it had not been able to confirm the presence of a suspected submarine near Helsinki last month.

In a rare incident, the military in April fired handheld underwater depth charges as a warning against what it suspected was a submarine in waters near the capital.

The Border Guard completed its investigation on Thursday by saying that part of the detected underwater sounds had a natural explanation, but the presence of a submarine or other underwater activity could not be completely excluded.

Finland, which shares an 1,340 km border with Russia, has been increasingly worried about its powerful neighbour after a year of Russian air force sorties and military border exercises.