In remarks to parliament, Khomchak also accused pro-Moscow separatists of systematically violating a ceasefire in the conflict in eastern Ukraine agreed in July 2020.
Ukraine and Russia have traded blame for a spike in violence in the conflict, which Kyiv says has killed 14,000 people since 2014.
The United States does not and will never recognize Russia's purported annexation of the peninsula, and we will stand with Ukraine against Russia's aggressive acts. We will continue to work to hold Russia accountable for its abuses and aggression in Ukraine.
The Biden administration has said still conducting its foreign policy reviews regarding Russia, China and other key areas after taking the reins from former Republican President Donald Trump on Jan. 20.