A Russian navy frigate and a nuclear-powered submarine docked on June 12 in Havana harbor, a stopover the United States and Cuba said posed no threat but which was widely seen as a Russian show of force as tensions rise over the Ukraine war. The Admiral Gorshkov frigate and the nuclear-powered submarine Kazan were accompanied by a tugboat and fuel ship that arrived earlier in the morning. The four vessels sailed to Cuba after conducting "high-precision missile weapons" training in the Atlantic Ocean, the Russian Defense Ministry said. The ministry said the submarine and frigate carry Zircon hypersonic missiles, Kalibr cruise missiles, and Onyx anti-ship missiles.