Lyudmyla Vakulenko, head of the Kozacha Lopan local administration, poses during an interview in Kozacha Lopan, Kharkiv region, on September 26, 2022, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

Lyudmyla Vakulenko, head of the Kozacha Lopan local administration, answers AFP journalists' questions in Kozacha Lopan, Kharkiv region, on September 26, 2022, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A Ukrainian soldier enters a destroyed building at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, on September 26, 2022 amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows a stuffed Russian army uniform on the gound at an industrial chicken farm, near which the Russian forces were dug in,, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows debris and graffitis at an industrial chicken farm, near which the Russian forces were dug in,, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows the remains of a container at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows sandbags and the letter Z, the symbol of Russian forces, on a wall at an industrial chicken farm, near which the Russian forces were dug in,, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022, shows debris on a destroyed bridge in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows debris in a bunker at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows makeshift physical training equipments in a building at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A Ukrainian soldier looks at a possible minefield near an industrial chicken farm, an area where the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, on September 26, 2022 amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows parts of a tank hanging from the damaged roof of a building at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows a part of an exploaded tank on the damaged roof of a building at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows a damaged car bearing the letter Z, the symbol of Russian forces, at a possible mine field next to an abandonned industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

A picture taken on September 26, 2022 shows stuffed Russian army uniforms in front of a damaged building at an industrial chicken farm, near which the Russian forces were dug in, near a suspected mass grave in Kozacha Lopan, Kharkiv region, amid the Russian invasion of Ukraine. - Ukraine's latest suspected mass burial site is in a shell-damaged and abandoned industrial chicken farm, on a hill near the Russian border strewn with the debris of battle. It is not known how many bodies lie there -- troops and officials speak of 90 to 100 without saying how they know -- but the signs of recent violence lie in the rubble all around. (Photo by Yasuyoshi CHIBA / AFP)

Kozacha Lopan, Ukraine - September 16, 2022 - A man cycles past a burnt-out building after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Ukrainian starosta of the Kozacha Lopan starosta district Liudmyla Vakulenko who has just assumed her responsibilities is seen at work in the office after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Servicemen deliver boxes with humanitarian aid to the village council in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Two men are seen outside the village council building in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A Ukrainian serviceman feeds two dogs in the square near the village council building in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The van is meant for the evacuation of local residents to the region's main city, Kharkiv, assisted by the National Guard from Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A military medic of Ukraine's National Guard helps to restore medical services for the residents of Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A military medic of Ukraine's National Guard consults a patient in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A military medic checks the supply of medicines as Ukraine's National Guard doctors work to restore healthcare services for the residents of Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A destroyed bridge is pictured outside Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The aftermath of hostilities is pictured in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Police officers deliver humanitarian aid to the residents of Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A truck marked with the 'Z' symbol is seen outside a public WC in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The message written by a Russian invader reads 'Day 82! Want to go home! Guys, Lopan changes people' as pictured in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The aftermath of hostilities is pictured in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Destroyed railway tracks are pictured at the railway station in Kozacha Lopan urban-type settlement after its liberation from Russian invaders, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The Kozacha Lopan railway station which is the last station on the Ukrainian side before the border with Russia is pictured after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Sandbags seal the windows at the Kozacha Lopan railway station which is the last station on the Ukrainian side before the border with Russia as pictured after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A book and letters lie on the table among glass shards at the Kozacha Lopan railway station which is the last station on the Ukrainian side before the border with Russia as pictured after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - Abandoned parcels for soldiers from Russia are among the garbage at the Kozacha Lopan railway station which is the last station on the Ukrainian side before the border with Russia as pictured after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - The mess left behind by Russian invaders in the ticket office is pictured at the Kozacha Lopan railway station after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A Ukrainian flag flies above a barricade of sandbags at the Kozacha Lopan railway station which is the last station on the Ukrainian side before the border with Russia as pictured after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A woman stands near a National Guard who helps with the evacuation of local residents to the region's main city, Kharkiv, after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - A senior man sits in the van during the evacuation of local residents to the region's main city, Kharkiv, after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM

Kozacha Lopan, Ukraine - September 16, 2022 - People sit in the van as the National Guard assists with the evacuation of local residents to the region's main city, Kharkiv, after the liberation of the town from Russian invaders, Kozacha Lopan urban-type settlement, Kharkiv Region, northeastern Ukraine. Photo by Vyacheslav Madiyevskyy/Ukrinform/ABACAPRESS.COM