US President Donald Trump slapped sanctions on Russia's two largest oil companies Wednesday, complaining that his talks with Vladimir Putin to end the Ukraine war "don't go anywhere."

The EU also unveiled a fresh wave of sanctions to pressure Russia to end its relentless, three-and-a-half-year invasion of its pro-Western neighbor.

Trump has held off pulling the trigger on sanctions against Russia for months, but his patience snapped after plans for a fresh summit with Putin in Budapest collapsed.

"Every time I speak with Vladimir, I have good conversations, and then they don't go anywhere," Trump said in response to a question from an AFP journalist in the Oval Office.

"They just don't go anywhere."

But Trump added that he hoped the "tremendous sanctions" against Russian oil giants Ro

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