This is stated in the statement of the US Foreign Ministry.
The United States expressed “deep concern” about Russia’s plans to block the movement of foreign ships in parts of the Black Sea, including near the occupied Crimea and the Kerch Strait. This is stated in a statement issued by the State Department.
“Russia has repeatedly taken aggressive actions against Ukrainian vessels and prevented access to Ukrainian ports in the Sea of Azov, affecting Ukraine’s international trade. This represents yet another unprovoked escalation of Moscow’s ongoing campaign to undermine and destabilize Ukraine. This development is particularly worrisome against the background of confirmed reports of a Russian military buildup in occupied Crimea and on the border with Ukraine, which has not been observed since the Russian invasion in 2014, and other provocative actions by Russian-led forces on the line of contact.”
The US Foreign Ministry reiterated its “unwavering support for the sovereignty and territorial integrity of Ukraine within its internationally recognized borders, including its territorial waters.” It recalled that the United States “does not and will never recognize the annexation of Crimea by Russia.”
“We pay tribute to Ukraine for its continued restraint in the face of Russian provocations and call on Russia to stop harassing vessels in the region and to reverse the build–up of forces along the border with Ukraine and in occupied Crimea,” the statement said.