1981: Soviet Union-Sweden Soviet Union conveys “unreserved formal regrets”

 The Soviet ambassador to Sweden conveys “unreserved formal regrets” to the Swedish foreign minister over a Soviet submarine that ran aground in Swedish territorial waters

To: 
Sweden
From: 
Soviet Union
Year of Apology: 
1981
Footnote: 
Tavuchis, Nicholas. Mea Culpa. Stanford, 1991. p105.