The US government blacklisted Russian shipowners, charterers and other shipping-related companies Tuesday, adding to its sanctions tied to Russia's annexation of Crimea.

The additions to the Office of Foreign Asset Control (Ofac)'s Specially Designated Nationals list come amid an uncertain moment in US policy towards Russia, as the administration of US President Barack Obama and President-elect Donald Trump (pictured below)conflict over allegations that Moscow used hacking to intervene in the US election.

"Today's