"Friendly" fire, eh? Now, the IDF should conduct another investigation and see if they can ascertain whether the "terrorists" were Shin Bet or Mossad. I believe that this qualifies Israel for some serious condemnation and sanctions from the UN. A war crime and a provocation by any other name are still a war crime and a provocation.
Palestinians report IDF airstrikes on Islamic Jihad targets in southern Gaza Strip (Haaretz)