This Is What Happens When a Russian Nuclear Submarine Slams into a U.S. Sub
How did this accident even happen? Some articles in the press characterized the subs as having been involved in a cat-and-mouse game that had gone too far. Indeed, such games were common between the attack submarines of rival nations, and had resulted in collisions in the past.
However, that account remains unlikely because a submarine can only play a cat-and-mouse game if it is able to detect the other ship. And in the shallow waters off of Kildin Island, it is unlikely either vessel could.