Mass graves in Izium, Ukraine, may be 'worse' than those found in Bucha, Biden adviser says

White House National Security Advisor Jake Sullivan said his Ukranian counterparts archer him the wide graves discovered successful Izium, Ukraine, aft Russian forces were pushed out, are successful immoderate ways "worse" than those discovered successful Bucha successful April.

Sullivan said helium was briefed connected the concern Tuesday greeting erstwhile helium spoke with Ukrainian main of unit Andriy Yermak.

"He gave maine a study astir what the Ukrainians were discovering astir Izium, and helium enactment it rather bluntly: He said that this is successful immoderate ways worse than Bucha, and we volition spot much of these arsenic we go, arsenic Ukraine de-occupies towns that person antecedently been occupied by Russian forces. We are uncovering expanding grounds of these wide atrocities."

More than 440 bodies, including those of civilians and children, person been recovered successful Izium since Russian troops withdrew from the metropolis earlier this month. Police recovered a wide sedate Friday with the bodies of 17 Ukrainian soldiers. Many had breached bones, hands tied down their backs and different signs of torture.

"We are going to enactment with the planetary assemblage done each mechanics that is disposable to clasp Russia accountable for this," Sullivan said astatine Tuesday's property briefing.

Ukrainian President Volodymyr Zelenskyy said successful a video code Saturday investigators had discovered much than 10 torture chambers successful the liberated areas of Kharkiv region.

The bodies of 458 radical were found aft Russians near Bucha. The politician of Mariupol said thousands of bodies were discovered successful a wide sedate discovered aft Russian soldiers withdrew from that metropolis successful April.

The Russian Embassy successful Washington, D.C., did not instantly respond to CNBC's petition for comment.