Baku, April 28, AZERTAC
Finland said Tuesday its navy had fired warning shots at a possible submarine off the coast of Helsinki in the early hours of the morning, according to AFP.
During surveillance of [Finland's] territorial integrity, the navy detected a possible underwater object at midday on April 27, 2015, within Finland's territorial waters close to the border outside Helsinki," the Defence Ministry said in a statement.
A second sighting was made during the night and "a warning was given with light depth charges at three in the morning," the ministry added.
No further sightings were reported after the warning shots and no details have been given of the type of vessel that was detected.