President Donald Trump insisted Friday that a meeting between Russian President Vladimir Putin and Ukrainian President Volodymyr Zelensky “will happen," even as the Kremlin ruled out talks between the two leaders in the near term.

The two sides agreed to have a prisoner exchange of 1,200 people, National Security and Defense Council Secretary Rustem Umerov said.

The Kremlin said on Friday that a summit between Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskiy could only happen as a final step to seal a peace deal. Kremlin spokesman Dmitry Peskov said that it was unlikely that such a meeting could occur by the end of August,