Twenty-one-year-old Ukrainian soldier Nazarii Hryntsevych, also known under the call sign "Hrinka," was killed on the front lines, the Contact 12 special forces group of the Azov Brigade said on May 7.Hryntsevych was one of the youngest soldiers who defended Azovstal, a steel plant that was the Ukrainian military's last stronghold in Mariupol, Donetsk Oblast, before the city became entirely occupied by Russia in May 2022, Suspilne reported.Hryntsevych was captured by Russia and reportedly held in a prison colony in the occupied part of Donetsk Oblast for over four months.