Ukrainian President Volodymyr Zelensky said after speaking with President Trump by phone on Sunday that the two will meet this week on the sidelines of the United Nations General Assembly in New York.

A source familiar with the conversation between Trump and Zelensky told Axios that Trump repeatedly urged Zelensky to stop Ukrainian attacks on Russian oil refineries, which he said were driving up global diesel prices.

The source said the word ‘diesel’ was used several times during the conversation.