Major European powers threw their weight behind an unconditional 30-day Ukraine ceasefire on Saturday, with the backing of U.S. President Donald Trump, and threatened President Vladimir Putin with "massive" new sanctions if he did not accept within days.

It’s a proposal that the Kremlin can neither reject nor accept, but one that may force it into an awkward choice, revealing Russian President Vladimir Putin’s true appetite for his brutal war of choice.

Ukraine and key European leaders agreed Saturday to an unconditional 30-day ceasefire beginning May 12 with the backing of President Donald Trump, threatening Russian President Vladimir Putin with new "massive" sanctions if he failed to comply.