Nations Under-Secretary-General for Political Affairs, cautioned "such convoys were not helpful in resolving Gaza's basic economic problems and needlessly carried the potential for escalation". [ 240 ] "Our stated preference has been and remains that aid should be delivered by established routes", the United Nations spokesman said, prior to new Lebanese ships sailing to Gaza on 23 July 2010, "There are established routes for supplies to enter by land. That is the way aid should be delivered to the people of Gaza." [ 241 ] Israel's United Nations Ambassador Gabriela Shalev said in letter to Secretary-General Ban Ki-moon about new Gaza-bound ships: "Israel reserves its right under international law to use all necessary means to prevent these ships from violating the ... naval blockade ". [ 242 ] Israel-Turkey diplomatic crisis Israel–Turkey relations reached a low point after the incident. Turkey recalled its ambassador, cancelled joint military exercises, and called for an emergency meeting of the UN Security Council. Turkish Prime Minister Recep Tayyip Erdoğan harshly referred to the raid as a "bloody massacre" and "state terrorism", and harshly criticized Israel in a speech before the Grand National Assembly . [ text 12 ] The Turkish Grand National Assembly held a debate on whether to impose sanctions on Israel, and eventually came out with a statement criticizing the attack as illegal, demanding that Israel apologize, pay compensation, and prosecute those involved, and calling on the Turkish government to review ties with Israel and take "effective measures". The flotilla raid was