Reuters sources report that Russia is believed to have around 200 such mercenaries, while official Chinese military officers are visiting areas near the frontlines to gather tactical insights.
Ukraine's Want to Find project received a record 10,027 missing Russian soldier inquiries in March 2025, with heaviest losses reported in Pokrovsk and Bakhmut.
Ukraine is ready to exchange all prisoners with Russia in what President Zelenskyy called a "fair option" during the Support Ukraine summit marking three years of full-scale war.
"Ukraine's prisoner affairs office reports more than 150 of its soldiers are being held captive in Grozny, where Chechen authorities use them as human shields at military facilities. The Red Cross has been denied access to verify prisoners' conditions.
Major General Igor Potapenko instructed Russian prison special forces to "be cruel" to Ukrainian prisoners in March 2022, former officials told The Wall Street Journal.