There have been International Calls for an investigation into the incident, in which more than a hundred palestinians were reported killed. Israel says its forces did open fire but said most of the deaths happened in a crush. From jerusalem, our Diplomatic Correspondent paul adams reports. How were so many people injured . Were they shot or crushed in a desperate stampede . Gazas Shifa Hospital treating just some of the survivors, and now, for the First Time Since thursday, first hand testimony from the un. This hospital is treating more than 200 people that were injured. We have seen people with Gunshot Wounds we have seen amputees, and we have seen children as young as 12. These events cannot be allowed to go on. Jehad is haunted by what he saw when the convoy arrived on thursday morning. Were the soldiers firing deliberately . Hes asked. Yes, with tanks, soldiers, aircraft. Gunfire in the pre dawn darkness, only the chaos was clear. How and why the shooting started is not yet proper