Russia and Ukraine are separately investigating allegations that Russian prisoners of war have been mistreated by Ukrainian soldiers.
An unverified graphic video has been shared online, claiming to show captured Russians being shot in the leg.
The footage was widely spread on social media platforms Telegram, TikTok and Twitter, including by a number of pro-Russian accounts.
Kremlin spokesperson Dmitry Peskov said on Monday that the images were "monstrous" and would need to be legally assessed so that those who had taken part in the alleged torture were held responsible.
The authenticity of the video's contents is still to be confirmed.
The graphic video shows a number of soldiers being forcibly pulled out of a van, while others are seen on the floor covered in what appears to be blood.
The captives still upright collapse to the ground after apparently being shot in the legs by a soldier wearing a blue armband.
Their captors -- speaking in Russian but using a Ukrainian dialect -- can also be heard asking for information regarding the prisoners' motives and which military units they came from.
Analysis by independent fact-checkers has found that the video was filmed at a dairy processing plant to the southeast of the city of Kharkiv. The date of the video remains unclear.
Some have drawn similarities with a clip posted in 2017, apparently showing the same plant as the one seen in the graphic video.
Ukrainian forces had recently retaken the area in question from Russian soldiers.
Ukraine's presidential adviser Oleksiy Arestovych issued a stark reminder to his country's soldiers in an address posted on Instagram.
"Since we have counterattacked in some areas, it means that there will be many prisoners," Arestovych said.
"I would like to
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