Finnish defence sources told the Iltalehti newspaper that from the beginning of their enquiries, the government considered it possible that Russia sabotaged the key pipeline
The Finnish Defence Forces (FDF) warn that the use of dummy drill ammunition as well as military aircraft and helicopters may cause noise disturbances in certain areas.
The Winter War of 1939-1940 saw Finland s forces use innovative tactics to defy Russia s hopes for a quick, emphatic victory. Pictured: Soviet troops who had been taken prisoner by Finnish forces.