In this photo provided by Ukraine's 65th Mechanised Brigade press service on April 10, 2026, a Ukrainian serviceman prepares a machine gun on a combat ground drone during a training at the polygon in Zaporizhzhia region, Ukraine. (Andriy Andriyenko/Ukraine's 65th Mechanised Brigade via AP)

In this image taken from a video provided by Russian Defense Ministry Press Service on Saturday, April 11, 2026, Russian servicemen arrive at an undisclosed location in Belarus after returning from captivity during a POW exchange of a group of servicemen between Russia and Ukraine. (Russian Defense Ministry Press Service via AP)

Medics helps a Ukrainian soldier who came back from Russian captivity during a POWs exchange between Russia and Ukraine in Chernyhiv region, Ukraine,, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)

People hold photos of their missed relatives as Ukrainian soldiers return from captivity during a POW exchange between Russia and Ukraine in Chernyhiv region, Ukraine, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)

People hold photos of their missed relatives as Ukrainian soldiers return from captivity during a POW exchange between Russia and Ukraine in Chernyhiv region, Ukraine, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)

People hold photos of their missed relatives as Ukrainian soldiers return from captivity during a POW exchange between Russia and Ukraine in Chernyhiv region, Ukraine, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)

People cry as they hold hold photos of their missed relatives as Ukrainian soldiers return from captivity during a POW exchange between Russia and Ukraine in Chernyhiv region, Ukraine, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)

A Ukrainian serviceman hugs his mother after returning from captivity during a POWs exchange between Russia and Ukraine, in Chernyhiv region, Ukraine, Saturday, April 11, 2026. (AP Photo/Efrem Lukatsky)