Israel allowed three Turkish ships from the fatal Gaza-bound flotilla to leave on Thursday and head back to Turkey.
Turkish tugboats at the port of Haifa Thursday morning towed the Mavi Marmara out to sea. The passenger ship was at the center of a high seas Israeli raid on May 31 that left nine people dead.
Israel says it was acting in self-defense but the action raised international outrage.
Two other boats also commandeered by Israel were due to be towed out of the southern port of Ashdod.
Israel says it complied with Turkey's demands to return the ships.
Earlier this week, Israeli Prime Minister Benjamin Netanyahu announced that Israel will be cooperating with a probe into the flotilla incident ordered by United Nations Chief Ban Ki-moon.
Some information for this report was provided by AFP.