Admiral Popov: The Kursk nuclear submarine was lost in 2000 as a result of a collision with a NATO submarine 
that the nuclear submarine (nuclear submarine) K-141 “Kursk” was lost in 2000 as a result of a collision with a NATO submarine. The name of the western submarine is almost known for sure, Popov said in an interview with RIA Novosti.
Admiral's version
The ex-commander-in-chief of the Sevflot revealed his own version of the death of the Russian submarine. He assumed that the submarine that collided with the Kursk was tracking him. In those sea conditions and other circumstances, the western submarine failed to ensure safety, so it came too close to the Kursk. According to the admiral, she was later found off the coast of Norway.
NATO submarine. And she was there, in the area where she collided with the Kursk
Vyacheslav PopovAdmiral
Popov added that the maneuver of the Russian nuclear submarine could also lead to “loss of contact.” According to the admiral, he can reveal the name of the NATO submarine with almost 100 percent certainty, but he will not do so for a number of reasons.
I know the name of it with a 90 percent probability, but in order to publicly name it, you need to have evidence and put it out. I can't upload them
Vyacheslav PopovAdmiral
At the same time, back in 2000, in the documentary film “August” by Arkady Mamontov, dedicated to the tragedy, Popov called the collision his main version of the incident. In his opinion, the Kursk collided “with an unidentified submarine, which struck the most vulnerable point of our boat of this project, of course, unconsciously.” “I am deeply convinced that these are not intentional actions,” Popov emphasized.
However, in this film, available on the journalist's YouTube channel, the admiral did not say that he was aware of the belonging of a possible submarine that the Russian Nuclear submarine. In addition, Popov did not indicate the available data on its name.
Possible NATO ships
According to information from Russian and foreign media, the US nuclear submarines Memphis and Toledo of the US Navy and Splendid of the British Navy were in the exercise area. The Russian Ministry of Defense asked the Pentagon for permission to inspect Memphis and Toledo submarines, but the department was refused. In the United States, the decision was explained by the “working condition of all submarines.” A similar statement was made by Great Britain, RIA Novosti reports with reference to the News24 portal.
SOS signals
The admiral also spoke about the knocks that came from the place where the Kursk was killed. He sent the recorded sounds ashore to an acoustic laboratory for analysis. In the report, Popov was told that the knocks were not given by the hand of a person, but by some kind of mechanism. According to him, domestic submarines lacked such capabilities as the signal itself. “Therefore, only a foreign submarine could submit it,” he noted.
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In July 2002, a Russian government commission presented an official version of what happened. The citizens were informed that the Kursk nuclear submarine had died as a result of a thermal explosion of the fuel components of the 65-76 torpedo, which then detonated. In addition, the commission decided to blow up the fragments of the submarine located at the bottom of the Barents Sea.
Experts explained the detonation of the fragments by the desire to secure navigation, since there could be unexploded torpedoes at the bottom. The place where the Kursk was killed is located in the center of the shipping and fishing area.
Talks between Putin and Clinton
In 2020, journalists noticed that on the website of the digital library of the 42nd President of the United States, Bill Clinton, transcripts of his telephone and personal conversations with his Russian counterpart Vladimir Putin, including a conversation about the death of the Kursk, appeared. In particular, Putin said that the submarine's crew died within 60 or 90 seconds.
We could not tell our relatives about this, but there was a hole in the hull about two meters in size, through which the first three compartments were flooded
Vladimir PutinPresident of RussiaChronology of the incident
Kursk sank on August 12, 2000 in the Barents Sea 175 kilometers from Severomorsk 108 meters. According to the authorities, the tragedy occurred as a result of the explosion of a torpedo on board and further detonation of ammunition during the exercises of the Northern Fleet. All 118 crew members died.
21year ago, the Kursk submarine died that other vessels recorded a sound that could be judged as an underwater explosion. After that, the submarine stopped communicating.