CAIRO, Egypt, Egyptian President, Abdel-Fattah al-Sisi, warned that, the U.S.-intended relocation of Israel embassy, from Tel Aviv to Jerusalem, would “complicate the situation in the Middle East region,” the Egyptian presidency said, in a statement.

Sisi’s remarks were made, during a phone call he received from U.S. President, Donald Trump, where they addressed the U.S. decision, recognising Jerusalem as Israel’s capital and moving the U.S. embassy in Israel to the disputed holy city, Egyptian presidential spokesman, Bassam Rady, said.

“President Sisi reiterated Egypt’s fixed position, regarding preserving the legal situation of Jerusalem within relevant international references and UN resolutions,” he added.

Sisi also stressed the necessity to avoid complicating the situation in the region, via procedures that “would undermine chances for peace in the Middle East,” according to the statement.

Also on Tuesday, Cairo-based Al-Azhar, the most prestigious Islamic learning institution in the Sunni Muslim world, warned that, the U.S. possible embassy relocation would “stir up Muslims’ sentiments of anger, threaten world peace and promote tension, division and hatred across the world.”

Egypt and Israel reached a U.S.-sponsored peace treaty in 1979, after which Egypt started working on reviving the Israeli-Palestinian peace process and brokering intra-Palestinian reconciliation.

Cairo hosted, in Oct, the signing of a reconciliation agreement between rival Palestinian movements, Fatah and Hamas, to end their long-time rift and enable a unity government to take over and have full control of the Hamas-ruled Gaza Strip.

The decades-long Palestinian-Israeli conflict emerged, since the Israeli occupation of Palestinian territories and the Western-backed creation of Israel in 1948.

Israel is blamed by the international community for the deadlock of the peace process, due to its settlement expansion policy, which is rejected even by its strongest ally, the United States.

The Palestinians seek to establish an independent state, with East Jerusalem as its capital, in light of the UN-proposed two-state solution, based on the pre-1967 borders.