Filing one of its regular updates via its Twitter feed, NBS said it had identified a Russian 'Kilo' class submarine and the now-familiar tugboat 'Viktor Konetsky' within Latvia's exclusive economic zone, 15 nautical miles (28 kilometers) from Latvia's sea border.
Tugboats typically act as support ships for submarines.
LV ekskl. ekonom.zonā 15 j.j. no terit.jūras bruņotie spēki 02.10.identific.Krievijas BS "Kilo" klases zemūdeni un velkoni "Viktor Konetsky"— NBS (@Latvijas_armija) October 2, 2016
NBS has a policy of identifying all unidentified Russian military vehicles at sea and in the air and informing the public of their presence.