Russia is forcing Ukrainian prisoners into its own army and starving others while "fattening" a few for show, Andrii Pasternak of the SBU's Joint Center for coordinating the search and release of prisoners says. Ukrainian intelligence also has information about Moscow creating battalions from Ukrainian prisoners of war (POWs), UkrInform reports.

As of May 2026, approximately 7,000 Ukrainian service members were held in Russian captivity, while the number of civilian detainees is estimated at between 10,000 and 20,000, according to Vice Speaker of the Ukrainian Parliament Olena Kondratiuk.

Russia is forming units from Ukrainian prisoners

Pasternak described the POW battalions as confirmed and monitored.

"We know about such battalions. Together with our colleagues from foreign intelligence and military intelligence, we track and record this. Such facts exist," he stated.

Forcing prisoners of war to serve in the captor's forces is itself a war crime. The Geneva Conventions prohibit compelling a POW to fight against their own country, and turning captured Ukrainian soldiers into Russian units, if confirmed at scale, would be a grave violation on top of the coercion required to make men fight the country they were defending.

Russia feeds up some prisoners and starves others

The coordinator also pointed to a practice of staging appearances before exchanges. Knowing whom it will hand over, Russia brings those prisoners, including civilians, into "normal form" through a process he called "fattening," drawing on testimony from released Ukrainian defenders and returned civilians.

The starvation behind it is deliberate and selective. Pasternak characterized it as an element of torture: some prisoners are deliberately not fed, while others are fed up so they look more or less normal for the swap. Ukraine's negotiators note at every meeting that the two sides' prisoners differ starkly, he added. The returning Ukrainians are almost all very thin, with only a few in decent condition, while the Russian POWs Ukraine hands back are genuinely well-fed.

A Ukrainian court sentenced the former chief engineer of Lyman’s locomotive depot to 15 years in prison with property confiscation for helping Russia target the frontline city, Ukraine’s Security Service (SBU) said on 11 August. Investigators report he sent a Russian handler the locations of Ukrainian positions intended for guided-bomb and artillery strikes.

Lyman blocks Russia’s northern route toward Sloviansk and Kramatorsk, which are part of Ukraine's fortress belt in the Donbas. As attacks on supply lines intensify, information about Ukrainian positions can help Russia direct bombs and artillery. The case fits a broader pattern of Russian intelligence recruiting people inside Ukraine to locate targets. Russian services have used money and blackmail, including threats against recruits’ families, to secure their cooperation.

According to the SBU, the former engineer traveled around Lyman and its outskirts to record Ukrainian military bases. He marked possible targets on Google Maps, then sent screenshots to a handler in Russia through a messaging app.

The collaborator operated from basement

The agency said an acquaintance whom it described as a “DNR deputy” in occupied Donetsk Oblast connected him with Russian intelligence. The SBU said the man moved into an apartment building’s basement to shelter himself while directing Russian strikes on the community.

SBU officers detained him in Sloviansk in May 2026. The agency said a seized smartphone contained evidence of his reconnaissance and contacts with the Russian side.

The SBU did not identify the man, the court, or any specific strike enabled by his information.

How Russia turns locals into spotters 

The Lyman case involved an acquaintance of the former engineer, but Russian services also use money, blackmail, and online platforms to find recruits. The SBU says minors may initially receive simple assignments, such as taking photographs or painting graffiti, before being directed toward more serious sabotage.

Other recruits have allegedly answered Telegram offers of “easy money.” These include a Zaporizhzhia man later convicted of building bombs and a Dnipro suspect accused of activating more than 1,000 Starlink terminals for Russian forces.

Ukraine has prosecuted similar cases before. In November 2024, a court sentenced another Russian agent to 15 years for guiding missile and drone strikes in Zhytomyr Oblast.

More recent cases remain at the allegation stage. The SBU has accused a Kharkiv Oblast man of installing hidden cameras near military sites and a Poltava student of mapping energy facilities while filming air-defense units.