Russia and Ukraine’s top diplomats on Saturday used a high-level conference in Turkey to once again trade accusations of violating a tentative U.S.-brokered deal to pause strikes on energy infrastructure, underscoring the challenges of negotiating an end to the 3-year-old war.

The two foreign ministers spoke at separate events at the annual Antalya Diplomacy Forum, a day after met with to discuss peace prospects. Ukraine's European allies on Friday promised billions of dollars to help Kyiv keep fighting .

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