The navy said it noticed an underwater target on Monday and again on Tuesday morning and fired some warning charges - the size of grenades.
Defense minister Carl Haglund did not say whether
Russia was involved. He told
Finnish media that the target could have been a submarine, and that it has
likely left the area, adding that Finland has rarely used such
"We strongly suspect that there has been underwater activity that does not belong there. Of course it is always serious if our territorial waters have been violated," Haglund told Finnish news agency STT.
"The bombs are not intended to damage the target, the purpose is to let the target know that it has been noticed," Commodore Olavi Jantunen told Helsingin Sanomat newspaper.
Reports of a submarine spotted off
Stockholm last year led to
biggest mobilization since the Cold War.
Regional tensions were reflected earlier in April after an unprecedented hawkish joint statement by Nordic countries -
Norway, Finland, Denmark
- that directly cited the Russian "challenge" as grounds to increase