KIEV -- Ukrainian President Volodymyr Zelensky said on Sunday he had a second phone conversation in two days with US President Donald Trump.

Zelensky described the discussion as "very productive," noting that it focused on strengthening Ukraine's defense capabilities, including long-range capabilities.

He added that the two leaders also discussed "many details on energy."

According to Zelensky, both sides agreed to continue the dialogue. The previous phone call between Zelensky and Trump was held on Saturday.