Arab leaders on Sunday called for a U.N. Security Council resolution condemning the U.S. decision last week to recognize Israeli sovereignty over the Golan Heights.

“We, the leaders of the Arab countries gathered in Tunisia … express our rejection and condemnation of the United States decision to recognize Israel’s sovereignty over the Golan,” said Arab League Secretary General Ahmed Aboul Gheit.

In addition to presenting a resolution, Gheit added that the countries would seek a legal opinion from the International Court of Justice.

U.N. Secretary General António Guterres, who addressed the meeting in Tunis, remarked that any solution to the Syrian conflict must enable the territorial rights of Syria, “including the occupied Golan Heights.”

European Union High Representative for Foreign Affairs and Security Policy Federica Mogherini said that disregarding U.N. Security Council resolutions related to the Golan is “not a solution.”

The Arab League leaders also urged cooperation with Iran and called for a two-state solution to the Israeli-Palestinian conflict.