Since the year 2000 there have been 9 major naval incidents involving submarines. There were three Russian submarine incidents, in two of which the submarines in question were lost, along with three United States submarine incidents, one Chinese incident, one Canadian, and one Australian incident. In August 2005, AS-28, a Russian Priz-class rescue submarine, was trapped by cables and/or nets off of Petropavlovsk, and saved when a British ROV cut them free in a massive international effort.