Here's a detailed report on what is now known about the accidental shooting of UNRWA worker Iain Hook by the IDF.

Hook and the others in the building had been huddling on the floor in a "container" building while the IDF exchanged gunfire with Palestinian gunmen hiding near the compound (the account knows of no Palestinian gunfire originating from within the UNRWA compound). At one point, Hook stood up, lit a cigarette, and exited the container while carrying his cellphone - at this point he was shot by the IDF sniper. Hook arrived at the hospital within half an hour of being shot, and there seems to be little basis to accusations that the IDF delayed the ambulance.