Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, kisses the plaque bearing his name at his grave, at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, mourns by his grave at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Andriy Halavin, an Orthodox priest, sprays holy water on believers after a service marking the Orthodox feast of Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Andriy Halavin, an Orthodox priest, sprays holy water on believers after a service marking the Orthodox feast of Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Andriy Halavin, an Orthodox priest, sprays holy water on believers after a service marking the Orthodox feast of Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Andriy Halavin, an Orthodox priest, sprays holy water on believers after a service marking the Orthodox feast of Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Andriy Halavin, an Orthodox priest, sprays holy water on believers after a service marking the Orthodox feast of Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

People attend the consecration of the willow branches on Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

People take part in the consecration of the willow branches on Palm Sunday, in the yard of the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

A woman lights a candle during the Palm Sunday mass at the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, reacts as she attends the Palm Sunday mass at the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, reacts as she attends the Palm Sunday mass at the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

A woman reacts as she attends the Palm Sunday mass at the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

People attend the Palm Sunday mass at the Church of St. Andrew and Pyervozvannoho All Saints, amid Russia's invasion of Ukraine, in Bucha, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, reacts by his grave at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, kisses the plaque bearing his name at his grave, at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Galina Bondar (63), who said her son, Olexander Bondar (32), a territorial defence member, was killed by Russian troops, mourns by his grave at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Nadiya Shapiro, who said her son, Vitaly Shapiro (32), a territorial defence member, was killed by Russian troops, mourns by his grave at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Nadiya Shapiro, who said her son, Vitaly Shapiro (32), a territorial defence member, was killed by Russian troops, mourns by his grave at the cemetery in Bucha, amid Russia's invasion of Ukraine, Kyiv region, Ukraine April 17, 2022. REUTERS/Zohra Bensemra 

Forensic technicians exhume the bodies of civilians who Ukrainian officials say were killed during Russia?s invasion and then buried in a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

Forensic technicians exhume the bodies of civilians who Ukrainian officials say were killed during Russia?s invasion and then buried in a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

Forensic technicians exhume the bodies of civilians who Ukrainian officials say were killed during Russia?s invasion and then buried in a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

Forensic technicians carry pull the body of a civilian who Ukrainian officials say was killed during Russia?s invasion, then buried and exhumed from a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

Forensic technicians inspect the body of a civilian who Ukrainian officials say was killed during Russia?s invasion, then buried and exhumed from a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

Forensic technicians exhume the bodies of civilians who Ukrainian officials say were killed during Russia?s invasion and then buried in a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

International Criminal Court (ICC) Prosecutor Karim Khan stands next to a grave where remains of three bodies were found, in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

International Criminal Court (ICC) Prosecutor Karim Khan stands next to a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

International Criminal Court (ICC) Prosecutor Karim Khan and Ukraine's Prosecutor General Iryna Venediktova visit a site of a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

International Criminal Court (ICC) Prosecutor Karim Khan and Ukraine's Prosecutor General Iryna Venediktova visit a site of a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

International Criminal Court (ICC) Prosecutor Karim Khan and Ukraine's Prosecutor General Iryna Venediktova visit a site of a mass grave in the town of Bucha, outside Kyiv, Ukraine April 13, 2022. REUTERS/Volodymyr Petrov 

SENSITIVE MATERIAL. THIS IMAGE MAY OFFEND OR DISTURB Ukrainian forensics investigators place remains of burned civilians exhumed from a grave in body bags, amid Russia's invasion of Ukraine, in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

French forensics investigators, who arrived to Ukraine for the investigation of war crimes amid Russia's invasion, listen as Ukraine's Prosecutor General Iryna Venediktova speaks, in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

French forensics investigators, who arrived to Ukraine for the investigation of war crimes amid Russia's invasion, stand next to a mass grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

SENSITIVE MATERIAL. THIS IMAGE MAY OFFEND OR DISTURB French forensics investigators, who arrived in Ukraine for the investigation of war crimes amid Russia's invasion, look at remains of bodies of burned civilians exhumed from a grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

SENSITIVE MATERIAL. THIS IMAGE MAY OFFEND OR DISTURB French forensics investigators, who arrived to Ukraine for the investigation war crimes amid Russia's invasion, watch as Ukrainian colleagues explore remains of bodies of burned civilians exhumed from a grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

French forensics investigators, who arrived in Ukraine for the investigation of war crimes amid Russia's invasion, stand next to a mass grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

French forensics investigators, who arrived in Ukraine for the investigation of war crimes amid Russia's invasion, stand next to a mass grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's Prosecutor General Iryna Venediktova speaks to a representative of French forensics investigators, who arrived to the country for the investigation of war crimes amid Russia's invasion, in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's Prosecutor General Iryna Venediktova speaks to a representative of French forensics investigators, who arrived to the country for the investigation of war crimes amid Russia's invasion, in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's Prosecutor General Iryna Venediktova speaks to the media next to a mass grave in the town of Bucha, in Kyiv region, Ukraine April 12, 2022. REUTERS/Valentyn Ogirenko 

Protesters wearing flower decorations in the colours of the Ukrainian flag hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

People hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

People hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

People hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

People hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

People hold placards with slogans against a massacre in Bucha during a pro-Ukrainian demonstration, amid Russia's invasion of Ukraine, outside Downing Street, in London, Britain, April 9, 2022. REUTERS/Henry Nicholls 

A person covered in red paint lies on the road as he takes part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

A person lies on the road beside a doll as she takes part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

A person lies on the road with a bicycle as he takes part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

A person lies on the road beside a doll as she takes part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

A person covered in red paint lies on the road as he takes part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny 

People take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny TPX IMAGES OF THE DAY 

Shoes covered in red paint lie on the road as people take part in a flashmob in front of the Russian embassy in Prague to commemorate the killings of the civilians in the Ukrainian town of Bucha, amid Russia's invasion of Ukraine, in Prague, Czech Republic, April 9, 2022. REUTERS/David W Cerny