 Russian forces were planning to place an anti-aircraft missile system on the Sergei Kotov patrol vessel, reportedly destroyed on March 5, Ukraine's military intelligence spokesperson Andrey Yusof told Radio Free Europe of the military intelligence agency confirmed that the project 22160 patrol ship was hit by Ukrainian Magura V-5 naval drones and sunk off the coast of occupied Crimea. The Russian Defense Ministry is yet to comment on the incident. This is a new ship worth more than $16 million. Ships of this type entered the service in 2017, and the enemy had plans for them, Yusof said. In addition to serving as a patrol boat, there were plans to place anti-aircraft systems on the ship itself, he added, regarding the vessel's crew, Yusof said that there are killed and wounded, but there is a possibility that some of the crew managed to evacuate. There are some informations that along with the Sergei Kotov that was sent to the bottom, the Ka-29 helicopter was also destroyed. The Kamov Ka-29, designated Helix B by NATO, is a twin-rotor naval helicopter developed in the 1970s. It can accommodate up to 16 troops. The Ka-29 helicopter operates from Russian warships.