GAZA CITY, Gaza Strip – The Arab world’s top diplomat declared support Sunday for the people of blockaded Gaza in his first visit to the Palestinian territory since Hamas violently seized control of it three years ago.

The visit was latest sign that Israel’s deadly raid on a flotilla trying to break the blockade of Gaza has eased the diplomatic isolation of the Islamic militant group.

Israel, meanwhile, appeared to grow more isolated in the fallout over the May 31 raid as Israeli Defense Minister Ehud Barak abruptly canceled plans Sunday to visit Paris.

Barak’s office said he canceled his trip while Israel forms a committee to investigate the raid. The statement denied that the decision was connected to attempts by pro-Palestinian groups to seek his arrest.

Israeli defense officials said Barak was concerned about the unwanted attention his visit would attract.

Arab League chief Amr Moussa’s visit to Gaza is part of an international push to end the three-year-old blockade that gained momentum after the naval raid.

“The siege must be lifted,” Moussa told reporters. “All the world is now standing with the people of Palestine and the people of Gaza.”

It was a significant declaration because many Arab countries have held the Iranian-backed Hamas at arm’s length, and Egypt, one of the Arab League’s most important members, has been Israel’s partner in keeping Gaza largely sealed.

Meanwhile, several Turkish educators and officials pulled out of an international Holocaust education conference in Israel to protest the raid, which killed nine Turkish activists, organizers said.