European leaders and Ukraine's Volodymyr Zelenskyy will speak to U.S. President Donald Trump this week ahead of his summit with Russian leader Vladimir Putin, amid fears Washington may dictate unfavorable peace terms to Ukraine.

Trump announced last week he would meet Putin on Friday in Alaska to negotiate an end to the 3-1/2-year war, which began with Russia's full-scale invasion of its neighbor.

Ukraine and its European allies fear that Trump, keen to claim credit for making peace and also hoping to seal lucrative joint business deals with Moscow, could align with Putin to cut a deal that would be deeply disadvantageous to Kyiv.