Gaza authorities are calling for the United Nations to investigate Israel for war crimes. Hundreds of bodies were unearthed in apparent mass graves at the Nasser and Al-Shifa hospitals, which were bombarded and occupied by Israeli troops. CGTN's Zhong Shi interviewed Jeremy Laurence, spokesperson for the UN High Commissioner for Human Rights. He talked about the prospect of an international probe into the mass graves and how to deal with the humanitarian catastrophe in Gaza.