Last week, 450 graves were discovered in forests outside Izium after the Ukrainian city was recaptured from the Russians. Ukrainian officials claim that 99 percent of the exhumed bodies show signs of violent death. The Kremlin has denied the allegations as "lies", while the EU presidency has called for the creation of an international war crimes tribunal.
In an interview with RFI and France 24 on Sunday, UN Secretary-General Antonio Guterres said he hopes the International Criminal Court will be able to investigate the alleged massacre in the eastern Ukrainian city.
