A Ukrainian serviceman from the Azov brigade, known by the call sign Chaos, smokes a cigarette while he waits for a command to fire, in a dugout around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
A Ukrainian serviceman from the Azov brigade, known by the call sign Yenot, smokes a cigarette in trenches around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
Ukrainian servicemen from the Azov brigade, known by the call sign Batya, left, and Buk, right, wait for a command to fire, at positions of 122 mm HM 16 mortar around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
A Ukrainian serviceman from the Azov brigade known by call sign Chaos, right, carries mortar shell, while he waits for a command to fire, at positions of 122 mm HM 16 mortar around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
Damaged trees are seen in the forest around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
Ukrainian refugees, playing roles of Ukrainian war prisoners, sing their country's national anthem at the end of an event in Bucharest, Romania, Saturday, April 13, 2024. Members of the Ukrainian refugee community staged an event dubbed "Voices of Captives" to raise awareness to the plight of Ukrainian servicemen and civilians still in Russian custody. (AP Photo/Vadim Ghirda)
Ukrainian servicemen from the Azov brigade, known by call sign Batya, left, and Buk, right, wait for a command to fire, at positions of 122 mm HM 16 mortar around one kilometer away from Russian forces on the frontline in Kreminna direction, Donetsk region, Ukraine, Friday, April 12, 2024. (AP Photo/Alex Babenko)
Ukrainian refugees, one impersonating a Russian soldier, other playing roles of Ukrainian war prisoners, perform during an event in Bucharest, Romania, Saturday, April 13, 2024. Members of the Ukrainian refugee community staged an event dubbed "Voices of Captives" to raise awareness to the plight of Ukrainian servicemen and civilians still in Russian custody. (AP Photo/Vadim Ghirda)