North Korean soldiers sent to bolster Russia’s forces are resorting to extreme measures. One recently detonated a grenade and blew himself up to avoid getting captured by Ukrainian troops.

Two captured North Korean soldiers were questioned about fighting with Russian forces against Ukraine. And NBC News' Janis Mackey Frayer spoke with former North Korean soldiers now in exile about the brutal conditions they found serving in the country's army.

Ukraine's President Volodymyr Zelenskiy said on Sunday Kyiv is ready to hand over captured North Korean soldiers to their leader Kim Jong Un if he can facilitate their exchange for Ukrainians held captive in Russia.

After Ukraine reported capturing two North Korean soldiers fighting with Russian troops, President Volodymyr Zelensky proposed a prisoner exchange. The Kremlin has refused to comment. Clare Sebastian reports.

Ukrainian President Volodymyr Zelenskyy posted videos Sunday of two North Korean soldiers captured while fighting in Russia's Kursk region. They are "the first captured soldiers from North Korea," but "there will undoubtedly be more,