"The transfer of Nadezhda Savchenko to Ukraine and Russians Alexandrov and Yerofeyev to Russia has been completed. This happened on the basis of the Convention on the Transfer of Sentenced Persons, ratified by Russia and Ukraine," Matvienko said.
"This is not a prisoner swap," she added.
The plane carrying Russian citizens Yevgeny Yerofeyev and Alexander Alexandrov has landed at Vnukovo Internatinal Airport.
In May 2015, Yevgeny Yerofeyev and Alexander Alexandrov were detained by Ukrainian forces near a front-line town in the Lugansk Region in eastern Ukraine. A Kiev court sentenced them to 14 years in prison, having found them guilty of terrorism-related activities.