We have examined exclusive Al Jazeera video filmed close to that second location at the rear of the convoy, about half a kilometre south of the roundabout.

Volleys of gunfire can be heard and people are seen scrambling over lorries and ducking behind the vehicles. Red tracer rounds can be seen in the sky.

Mahmoud Awadeyah said the Israeli vehicles had started firing at people when the aid arrived.

"Israelis purposefully fired at the men... they were trying to get near the trucks that had the flour," he said. "They were fired at directly and prevented people to come near those killed."