The United Nations called for a “a clear, transparent and credible investigation” of mass graves discovered at the al-Shifa Hospital in Gaza City and the Nasser Hospital in Khan Younis, both of which were recently raided by Israeli troops. UN spokesperson Stephane Dujarric told reporters that credible investigators and more journalists must have safe access to the sites to conduct factual assessments of the situation. However, he added, for the UN to conduct the investigation, one of its major bodies would have to authorize it. “I think it’s not for anyone to prejudge the results or who would …