The below is attributable to Spokesperson Matthew Miller:

Secretary of State Antony J. Blinken spoke with Ukrainian Foreign Minister Dmytro Kuleba today. The two discussed the latest situation on the battlefield and the United States’ steadfast support to Ukraine as it defends itself against Russia’s brutal attacks on civilians and critical infrastructure. The Secretary expressed his concern for the thousands of Ukrainians impacted by the recent destruction of the Kakhovka dam, offering further U.S. support for those affected. They also discussed the Foreign Minister’s recent trip to Africa.

Original source can be found here.