Zombietime, however, convincingly exposed this claim as a fraud. It is worth reading its analysis in full in order properly to grasp both the enormity of the libel and the way it was not only uncritically accepted but gleefully embellished by respected media outlets, whose journalists either didn’t know or care that they were transmitting an outright fabrication. Anyone with even the most cursory knowledge of the kind of missiles used by the Israeli air force would grasp immediately that the hole in the roof of the ambulance whose picture went round the world could not have been caused by such a missile. If a missile had indeed hit it there would have been no roof remaining to inspect; nor would there have remained an ambulance. Yet the rest of the ambulance in the pictures, although damaged, was pretty well intact — and the allegedly seriously injured ambulance driver not only was pictured with minor injuries, but even these had miraculously disappeared without trace in pictures taken a few days later.
http://www.zombietime.com/fraud/ambulance/
The Red Cross Ambulance Incident - images at link.