Turkey has called off an international military drill because it opposed Israel's participation, Israeli defense officials said Sunday, a move that sent strained relations between the two nations to a new low, AP reported. Turkey has long been the Jewish state's best friend in the Muslim world. But ties have deteriorated dramatically since Israel's war last winter against Islamic militants in the Gaza Strip, which killed hundreds of civilians. Turkey, a secular country ruled by an Islamic-oriented party, strongly condemned the Israeli offensive. Tensions soared after Turkish Prime Minister Recep Tayyip Erdogan stormed out of a high-profile conference where he confronted Israel's president over steep Palestinian civilian casualties. Turkey's surprise cancellation of the air force drill, which was also to include the U.S. and NATO, was the first time its criticism of Israel has been translated into concrete action. A brief statement posted on the Turkish military's Web site said the sixth annual Anatolia Eagle drill would take place Oct. 10-23, but that international participation had been canceled after «international negotiations conducted by the Turkish Foreign Ministry.» A Turkish government official, who spoke on condition of anonymity because of the sensitivity of the issue, insisted that the decision was «due to a technical matter» rather than a political decision. However, both Israeli and NATO officials confirmed the Turks had banned Israel from the drill. «The exercise has been postponed as a result of Turkey's decision to change the list of participating countries, thus excluding Israel,» the army said in a statement. Israeli officials said that in response to Turkey's decision against Israel, the U.S. pulled out of the exercise, forcing Ankara to cancel the drill. They spoke on condition of anonymity because they were not authorized to discuss the matter with the media. There was no immediate U.S. comment. The defense officials expressed disappointment with the decision. Beyond the diplomatic damage, they said the drill is an important training opportunity for Israeli pilots, who generally are confined to Israel's limited airspace. Israeli officials are also concerned about Turkey's growing alliance with Iran. Israel considers Iran its greatest threat, citing Tehran's suspect nuclear program and its support for anti-Israel militant groups. Turkey and Israel grew close in the mid-1990s, their alliance based on mutual fears of Iran, Iraq and Syria. Israel has supplied hundreds of millions of dollars of military equipment to Turkey over the years and has renovated Turkish tanks and fighter planes. The two countries have also conducted joint naval exercises, including a drill with the U.S. in the Mediterranean in August, the Israeli air force has trained over Turkish airspace and last year Turkey hosted months of indirect talks between Israel and Syria after an eight-year breakdown. Turkey is also a popular destination for Israeli tourists. But since Erdogan's Islamic government came to power in 2003, Turkey's ties with Israel have cooled as it has grown closer to Iran, Syria and Hamas _ the Islamic leaders of Gaza.