June 3 (UPI) -- United Nations head Antonio Guterres has called for "an immediate and independent investigation" into reports that Israeli forces shot and killed dozens of Palestinians seeking aid in Gaza over the weekend. "I am appalled by the reports of Palestinians killed and injured while seeking aid in Gaza yesterday. It is unacceptable that Palestinians are risking their lives for food," Guterres, the United Nations' secretary-general, said Monday in a statement . "I call for an immediate