The prisoner exchange is the latest between the two countries and is made ahead of the summit between Russia's President Vladimir Putin and the US's counterpart Donald Trump in the American state of Alaska on Friday.
The United Arab Emirates has mediated the exchange, according to the Russian Ministry of Defense. The released Russians will receive "psychological and medical support", adds the ministry.
Ukraine's President Volodymyr Zelenskyj states that there are both soldiers and civilians among the Ukrainian exchanged prisoners, and that some of them have been held by Russia since 2014, 2016 and 2017. Also "defenders of Mariupol" are included in the exchange, according to Zelenskyj.
