Mass graves and bullet-scarred churches mark the torment of the Kyiv suburb of Bucha under Russian occupation, where traumatised residents now face a new anguish: a U.S.-led peace proposal that would offer a blanket post-war amnesty for the perpetrators of atrocities. (AP video shot by Oleksii Yeroshenko)

United States Army Secretary Dan Driscoll held secret talks on Monday with a Russian delegation in Abu Dhabi in the United Arab Emirates to follow up on this weekend’s talks with Ukraine in Geneva that were intended to move the Ukraine peace process forward, a U.S. official told ABC News.

Russia is threatening to reject President Donald Trump's Ukraine peace plan unless "key understandings" from his Alaska summit with President Putin are upheld.

Top European and Ukrainian envoys have met in Geneva ahead of talks with U.S. Secretary of State Marco Rubio about President Donald Trump's proposal to end Russia’s war on Ukraine.

America’s top diplomat struck a relentlessly upbeat tone in Geneva, after a rollercoaster day of intensive negotiations aimed at convincing a skeptical Ukraine to accept the latest US proposals to end Russia’s brutal war.

The Trump administration’s Army secretary will sit down Tuesday with Russian officials in Abu Dhabi to present a slimmed-down plan to end Moscow’s 33-month-old invasion of Ukraine.

A senior Kremlin official confirmed Wednesday that U.S. special envoy Steve Witkoff is set to visit Moscow next week as efforts to find a consensus on ending the nearly four-year war between Russia and Ukraine pick up speed.

Some European leaders have pushed back against parts of the the U.S.-led Ukraine peace plan, demanding full involvement in negotiations as talks continue.

Despite “a few remaining points of disagreement,” President Trump heralded his team’s “tremendous progress” made towards ending Russia’s war in Ukraine.