According to TASS and other media on October 29, Russian President's press secretary, Kremlin spokesman Peskov said that the Russian side will inform the relevant parties when testing weapons equipment such as the nuclear-powered unmanned submarine Poseidon in accordance with the regulations.

Asked whether Russia had notified the United States of testing the nuclear-powered drone Poseidon, Peskov replied that "all tests of such advanced weapons equipment are strictly compliant with all international law and bilateral agreements, and also comply with all notification rules."

Russian President Vladimir Putin said on Monday that the nuclear-powered unmanned submarine Poseidon had been tested and that, in terms of the speed and depth of the Poseidon, there is currently no such unmanned submarine in the world, which cannot be intercepted at the moment.