May 23 (UPI) -- A prisoner swap is underway Friday between Ukraine and Russia, Ukrainian officials said.

The swap, involving 1,000 prisoners from each side, began on Friday and was not yet completed, Radio Free Europe/Radio Liberty, The Kyiv Independent and CNN reported.

The process of exchanging the prisoners is expected to take several days, CNN reported.

U.S. President Donald Trump, however posted on his Truth Social account Friday that the swap had been completed.

Related