Two Russian shipyards have been placed on a new US sanctions list.

The action was taken against Yaroslavsky and Zelenodolsk by the Office of Foreign Assets Control (OFAC) in response to Russia’s continued and ongoing aggression in Ukraine, it said.

OFAC added the yards had played a role in Russia’s "unjustified attacks on Ukrainian naval vessels in the Kerch Strait, the purported annexation of Crimea, and backing of illegitimate separatist government elections in eastern Ukraine."

"These actions complement sanctions also taken today by the European Union and Canada, and underscore the strength and commitment of the transatlantic partnership to counter Russia’s continued destabilising behaviour and malign activities."

The Yaroslavsky plant was sanctioned for being the project developer for a naval vessel that was completed at the Federal SUE Shipyard Morye in Crimea.

The Zelenodolsk yard was targeted for "collaborating" with Crimea-based enterprise Skloplastic, which was unlawfully nationalised by the Russian government.