Zelenskyy says Russian chambers containing 'tools for electric torture' were found in the Kharkiv region of Ukraine along with mass graves containing at least 450 bodies

• Ukrainian President Volodymyr Zelenskyy said "torture chambers" had been found in the Kharkiv region.
• The 10 chambers contained "tools for electric torture," Euronews reported Zelenskyy said.

Ukrainian President Volodymyr Zelenskyy said in a Saturday address that "torture chambers" and mass graves had been found in the country's Kharkiv region after Russian troops retreated.

The discovery comes as Ukraine's Ambassador to the United States Oksana Markarova said during a Sunday interview with ABC News's "This Week" that "war crimes of massive proportions" are occurring as a result of the Russian invasion that began in February.

"More than 10 torture chambers have already been found in the liberated areas of Kharkiv region, in various cities and towns," Zelenskyy said in a video address late Saturday, CNN reported. "As the occupiers fled, they also dropped the torture devices."

Zelenskyy added that rooms designed for killing and "tools for electrical torture" were found at the Kozacha Lopan railway station.

Kozacha Lopan, a settlement less just over a mile from the Russian border, was retaken by Ukrainian forces on September 11, AP reported.

"There is already clear evidence of torture, humiliating treatment of people," Zelenskyy said in a Friday statement. "Moreover, there is evidence that Russian soldiers, whose positions were not far from this place, shot at the buried just for fun."

In Izium, a city on the Donets River in Kharkiv Oblast province, efforts are underway to identify the bodies of some 450 people, mostly civilians, found in a mass grave, the Kyiv Independent reported.

Reuters reported some of the bodies were found with ropes around their necks and their hands tied.

Similar graves were found in Bucha in March, when the bodies of 116 people were recovered after the city was liberated from Russian occupation.