President Donald Trump inserted fresh tensions into the high-stakes Ukraine-Russia peace talks on Sunday, publicly accusing Kyiv’s leaders of showing “zero gratitude” for U.S. support just as U.S. off...

The United States and Ukraine were set to continue work on Monday on a plan to end the war with Russia after agreeing to modify an earlier proposalthat was widely seen as too favorable to Moscow.

Russian President Vladimir Putin said a version of the plan seen by Russia is “in line with the discussions” at the US-Russia summit in Alaska earlier this year.