President Donald Trump’s sanctions targeting Russia’s two largest oil companies could undermine the country as a petrostate, an energy expert has told Newsweek .

However, the measures announced on Rosneft and Lukoil to pressure President Vladimir Putin to agree to a ceasefire following his full-scale invasion of Ukraine do not go far enough, according to Razom for Ukraine, which lobbies for energy sanctions against Russia.

Dmitry Medvedev, deputy chairman of Russia's Security Council said on Thursday that the U.S. was Russia's "adversary" and Trump "has now fully embarked on the warpath against Russia."

Newsweek has contacted the Kremlin via email for comment.

Why It Matters

The new penalties against the Russian state oil giants are the first sanctions Trump has announced against

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