The first round of trilateral talks was held last month.

Envoys from Moscow and Kyiv met in Abu Dhabi on Wednesday for another round of U.S.-brokered talks on ending the almost four-year war as Russian cluster munitions killed seven people at a market in Uk...

Last month’s discussions in Abu Dhabi, part of a U.S. push to end the fighting, yielded some progress but no breakthrough on key issues, officials said.

A 15-year-old treaty that has limited how many nuclear weapons the United States and Russia can maintain comes to an end this week, as experts warn that no new agreement could portend a new arms race ...