Finland Says Can't Confirm Presence of Submarine in April

A Russian kilo-class submarine.

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.

See alsoAmid Russia Tensions Finland Fires at Suspected Submarine

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 833 mile (1,340 km) border with Russia, has been increasingly worried about its powerful neighbor after a year of Russian air force sorties and military border exercises.

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