President Donald Trump spoke with his Ukrainian counterpart, Volodymyr Zelenskyy, on Friday, just a day after he talked with Russian leader Vladimir Putin in a call that he has described as a disappointment amid his attempts to end the war in Ukraine.

Ukrainian President Volodymyr Zelenskyy said Friday he had "an important conversation” with U.S. President Donald Trump. The two leaders discussed how Ukrainian air defenses might be strengthened, and possible joint weapons production between the U.