Not "independent sources": one unnamed Magen David Adom medic who claims to have heard so from IDF soldiers. The same medic claims to have transported the victims and wounded, whereas the UN version has a Pal. RC ambulance transporting them.
Well I have a few problems with this argument.
Firstly, if MDA is not an independent source, neither is the ICRC or any other Red Cross or Red Crescent organisation, given that the MDA is a member of the International Red Cross and Red Crescent Movement. Further, given that in Palestine the Red Crescent is used, not the Red Cross, if it is acceptable to claim that a Palestinian Red Crescent Ambulance is actually a Red Cross ambulance, it is also acceptable to describe an MDA ambulance as a Red Cross ambulance.
The contention would, therefore, seem to be only whether the ambulance came from Israel or Palestine. Given that the patients are without refute being treated in an
Israeli hospital, it stands to reason they were recovered by Israeli medics, as claimed by MDA and the staff treating the survivors.
You're right that the medic does not claim to have witnessed the attack himself, but I am not sure that's relevant. The UN claim the damage was done by a tank shell, the MDA claims it was done by small arms fire. Were it the first, blame must lie with Israel. Were it the second, blame could lie with either group.
The medic in question would have seen the wounds while transporting the patients, irrespective of whether he was at the scene or not. A struggle to believe a trained medic could confuse wounds from a tank shell with gunshot wounds.
Likewise, staff at the hospital where the survivors are being treated make it clear the men are being treated for gun shot wounds, not shrapnel or other wounds associated with a tank shell.
So it appears to be pretty clear that the UN is false in their initial claim that the convoy was hit by tank rounds. This does not help the UN's credibility, given their track record in this conflict. The comments of the Director of Operations do not help:
(From the Jerusalem Post)
Ging acknowledged, however, that he could not be absolutely certain that the attacks came from IDF forces, telling a reporter who asked whether other combatants may have been responsible, "There is a conflict going on."
That sound's like a fairly weak way of deflecting the question if you ask me. The UN seems rather quick to point blame at Israel, but when questioned on whether they could be mistaken, they refuse to give an answer.
Why is that?
Frankly the group losing credibility rapidly in this conflict is the UN, and credibility is
really something they cannot afford to lose at this point. They're down to their undergarments.