Istanbul (CNN) -- Turkey ordered the expulsion of Israel's ambassador and other senior diplomats stationed there on Friday, a dramatic slap against its one-time close ally over its failure to apologize for a deadly raid last year on a Gaza-bound ship in a flotilla loaded with humanitarian aid. Low-level officials are allowed to stay, but others must leave by Wednesday, a Turkish official said. Turkey has been incensed with Israel after its commandos clashed with Turks on one of the flotilla ships, the Mavi Marmara, and killed nine people. This comes on the same day that U.N. released a report about the May 2010 raid. The document criticized Israel's actions in the incident, even as it describes the Israeli naval blockade of Gaza as a "legitimate security measure." Secretary-General Ban Ki-moon received a copy of the report on Friday, a U.N. spokesman said.
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NEW: Soldiers acted in self-defense, Israel says
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NEW: The U.N. and U.S. regret a U.N. report didn't bridge the Israel-Turkey rift
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Turkey wants an apology from Israel over the flotilla raid
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Disagreements over Gaza have caused ties to deteriorate
Pope said Turkey's stance on @placeholder could be risky in its relationship with the United States.
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"As to the ambassador in Turkey, he had finished his posting a couple of days ago and had already said goodbye to his Turkish colleagues and was expected in @placeholder in the coming days," the Israeli official said.