Muslim countries must definitely act united and oppose Israel's plan to take control of Gaza City, Turkish Foreign Minister Hakan Fidan said on Saturday after talks in Egypt.
Regional powers, Egypt and Turkey, condemned Israel's plan on Friday.
Ankara said this marks a new phase in what it called Israel's "genocidal and expansionist" policy, calling for global measures to stop its implementation.
Israel denies this description of its actions in Gaza.
Speaking at a joint press conference in El Alamein with his Egyptian counterpart, Badr Abdelatty, after a meeting with Egypt's president, Abdel Fattah al-Sisi, Fidan said the Organization of Islamic Cooperation (OIC) had been called for an emergency meeting.
Fidan said Israel's policy aims to force Palestinians to leave their lands through starvation and occupy Gaza permanently, adding the countries no longer have any reason to continue supporting Israel.
Israel denies that it intends to cause a hunger crisis in Gaza and says the Palestinian militant group Hamas - declared a terrorist organization by the US and EU - could end the war by surrendering.
"What is happening today is a very dangerous development... not only for the Palestinian people or neighboring countries," Abdelatty said, adding that Israel's plans are "unacceptable."
Abdelatty said he has full agreement with Turkey on the Gaza issue and referred to a statement released on Saturday by the OIC Ministerial Committee, which condemned Israel's plan.
The OIC committee said Israel's plan constituted "a dangerous and unacceptable escalation, a flagrant violation of international law and an attempt to strengthen the illegal occupation," warning that it would "destroy any possibility of peace."
Mediation teams from Egypt, Qatar and the United States have been working for months to reach a ceasefire between Israel and Hamas.
The OIC called on world powers and the UN Security Council to "assume their legal and humanitarian responsibilities and take urgent action to stop" Israel's plan for Gaza City, while ensuring immediate accountability for what it called a violation of international law by Israel. /rel