Israel has rejected calls from the United Nations and others for an international investigation into its deadly raid on the Gaza aid flotilla.
Its says its commandos used force only after activists on board the Turkish flagship attacked them. Nine of the activists were killed.
Israel's military is already investigating the raid.
The office of Israeli PM Benjamin Netanyahu said there was "no case in recent history" where a democratic country's army involved in the deaths of civilians in an overseas operation has been subjected to an international investigation.