The channel notes that Biden and Zelensky hold telephone conversations every time after the US allocates another military aid package.

“But the telephone conversation between the two leaders in June turned out to be different from the previous ones,” the article says.

Biden had barely finished telling Zelensky that he had approved another $1 billion in military aid to Ukraine, sources said, when Zelensky began listing all the extra aid he needs but isn't getting.

“Biden lost his temper,” the TV channel was told.

According to sources, the American president raised his voice, while Zelensky "could have shown a little more gratitude."

According to The Washington Post, US leader Joe Biden told Zelensky that the US Congress could refuse to allocate money to Kyiv if the Ukrainian president continues to publicly complain about insufficient military assistance.