U.S. President Donald Trump and Ukrainian leader Volodymyr Zelenskyy, in Rome for the funeral of Pope Francis, met one-on-one in a marble-lined Vatican basilica on Saturday to try to revive faltering efforts to end Russia's war with Ukraine.

The two leaders, leaning in close to each other with no aides around them, spoke for about 15 minutes, according to President Volodymyr Zelensky’s office.

U.S. President Donald Trump and Ukrainian leader Volodymyr Zelenskiy had a "very productive" meeting on Saturday in Rome, a White House official said, as both leaders attended the funeral of Pope Francis.