The U.S. President Joe Biden in his first phone conversation with Ukrainian President Volodymyr Zelensky discussed support for Ukraine amid Russian aggression, reform issues and the coronavirus epidemic.

This was reported by the press service of the White House at the end of the conversation.

“President Joseph R. Biden, Jr. spoke today to President Volodymyr Zelensky of Ukraine. President Biden affirmed the United States’ unwavering support for Ukraine’s sovereignty and territorial integrity in the face of Russia’s ongoing aggression in the Donbas and Crimea,” the White House said.

Biden emphasized the administration’s commitment to reinvigorating the strategic partnership between the countries in support of Zelensky’s anti-corruption plan and implementing a reform agenda based on shared democratic values that ensure justice, security and prosperity for the people of Ukraine, the statement said.

“The leaders agreed these reforms are central to Ukraine’s Euro-Atlantic aspirations,” the White House stressed.

In addition, Biden and Zelensky also discussed the importance of close cooperation between the U.S. and Ukraine to contain the COVID-19 pandemic and strengthen democracy in the region.

As a reminder, several high-level phone conversations between Ukrainian and the U.S. officials took place this week.

They came after media reports on April 1 that the U.S. European Command put troops on highest alert after occupiers in Donbas violated the ceasefire and killed four Ukrainian servicemen, and Russia began pulling troops to the border with Ukraine.

NATO ambassadors met urgently in Brussels on April 1 to discuss the recent spike in violence in Donbas and the Russian troop build-up near Ukraine’s borders.

The United States warned Russia against “intimidating” Kyiv amid reports of a Russian military build-up on the Ukrainian border.