The supposed incident is described in a book whose title I can't remember, but will look up tomorrow in the office and post then.

The Soviets were supposedly intending to make the US think that the Chinese had made the nuclear strike on Pearl Harbor, thereby inciting a US nuclear strike on China.

The incident is dated to the 1970's when the Chinese had newly acquired nuclear capability. The Russian sub in question was raised by the Glomar Explorer operated by the Howard Hughes organization with CIA support, once again according to the book.

The book makes a most interesting read and leads the reader,at least this one. to believe that it could even be true