http://www.hisutton.com/Spy Subs -Project 09852 Belgorod.html Check out the twin screws on this bad boy. Red October?
Some reports saying it was the Losharik or a submersible deployed from it. Still sketchy details. It is Russia after all.
What was that you said??? I can't hear you over the racket from this Soviet submarine going by... Hang on a minute....