"In the exclusive economic zone of 11 miles from the border of Latvia, the National Armed Forces have identified a Russian "Kilo"-class submarine," the Latvian armed forces wrote on Twitter on Monday.
LV ekskl. ekonom. zonā 11 j.j. no terit. jūras bruņotie spēki šodien identificēja Krievijas BS "Kilo" klases zemūdeni.— NBS (@Latvijas_armija) 4 квітня 2016 р.
Latvia has repeatedly reported the Russian warships at the country's borders. On May 3, 2015, the Latvian armed forces spotted a squadron of Russian warships, including a submarine, within five miles of its territorial waters.