Ismail Haniyeh is on an official tour of the Muslim world, his first trip outside the blockaded territory since the Islamist group overran Gaza in 2007. Turkey’s ties with Israel, a former ally, deteriorated sharply over the flotilla raid that killed nine activists on the Turkish boat, and Erdogan has demanded that Israel lift all restrictions on the Palestinian territory.

Haniyeh is scheduled to meet Erdogan at his Istanbul residence on Sunday afternoon. On Monday, he will meet officials of the Islamic aid group IHH.