ANKARA, Turkey (AP) – Turkey may not send its ambassador back to Israel unless it receives an apology for the deadly raid on a Gaza-bound aid ship and other steps are taken to make amends, a government official said Thursday.

Turkey wants Israel to apologize for the raid, return the seized ships, agree to an international investigation into the raid and offer compensation for the victims, the government official said. The official spoke on condition of anonymity in line with government rules that bar civil servants from speaking to journalists without prior authorization.

The May 31 raid killed nine pro-Palestinian activists, including eight Turks and a Turkish-American teenager, drew international outrage and prompted Turkey to withdraw its ambassador.

Turkey, which had a solid alliance with Israel until the three-week Gaza war that ended in early 2009, has already canceled three joint military drills and has said it would reduce military and trade ties and shelve discussions of energy projects, including natural gas and fresh water shipments.

The official said Turkey would not send an envoy to Israel until the country takes steps toward meeting the demands. No time frame was given but the official said Turkey wanted its expectations to be met within a “reasonable” period of time.

Turkey recently named a new ambassador for Israel but it was unlikely that he would take up his post by August, as initially planned, the official added.

The Turkish ship was part of a six-vessel international aid flotilla sailing to Gaza to break an Israeli blockade imposed to keep weapons and other military components out of the hands of Gaza militants who have attacked Israel with bombs, rockets and mortars for years.

Israel insists troops involved in the deadly raid acted in self defense after being attacked by some of the activists on board. Israel has objected to an international an inquiry into the operation and has set up its own investigative commission. projects, but only under international supervision.