Russia has opened a further nine temporary accommodation centers to receive people from Ukraine and the self-declared republics, Russian state news agency RIA Novosti reported Wednesday.
"There are 523 temporary accommodation centers functioning in 53 regions of Russia, they house 34,140 thousand people, including 11,790 thousand children," RIA Novosti reported an emergency services as saying.
Currently 66 centers are operating in the Rostov region, the main "entry gate" to Russia for people from Ukraine.
Ukraine officials claim that Russia is forcibly deporting people from Mariupol and other areas in the Donbas region, and consider it a war crime.
Earlier this month, Ukrainian President Volodymyr Zelensky said more than half a million Ukrainians have been deported to Russia since the start of the war.
"They were forced to go there. Their documents and means of communication are confiscated. They are sent to far-away regions of that foreign land in order to assimilate there," Zelensky said on May 6.
CNN is unable to independently confirm the number of Ukrainians who have been taken across the border into Russian territory.