"US authorities continue to generate new accusations against Russia to deflect attention from flagrant violations of human rights both in its satellite states… and at home," the Embassy said in a statement.
She said Russian ships had stopped at least 16 commercial ships going to Ukrainian ports since April, in what she referred to as an attempt to destabilize Ukraine.
The Russian diplomatic mission, in turn, slammed the United States for closing eyes to Ukrainian "piracy" in the Sea of Azov, where its coast guards seized a Russian trawler in March and have been illegally holding a tanker and its crew in the port of Kherson since August 10.
"The State Department will not divert our attention from these appalling acts. We call on the Americans to stop shielding their unruly charges in the Sea of Azov and start a detailed dialogue on Russian nationals jailed in the US," it concluded.