Its not that uncommon. Below is a link to a book that many fought to ban several years ago. Whilst it talks mainly about the USN it tells severall stories of "Allied" mishaps !
"Among the more remarkable stories detailed here are the Navy's successful attempts to locate a lost Soviet nuclear sub (which the CIA later attempted - embarrassingly unsuccessfully - to salvage from the bottom of the ocean), the mysterious loss of the US sub Scorpion (along with new information that would seem to finally explain the cause of the tragedy), and the collision of an American sub with one of its Soviet counterparts
(just one of a surprising number of such collisions)"