The Organization of Islamic Cooperation and the Arab League on Monday condemned what they described as “illegal” Israeli steps to designate large areas of the occupied West Bank as state property, warning that the measure threatens prospects for peace and urging swift international intervention.

In a post on U.S. social media company X, the OIC warned of "a series of illegal steps” taken by Israeli authorities, most recently the start of procedures to designate land in the occupied West Bank as "state property.”

The organization said the measures aim to deepen control, strengthen settlement and annexation, alter the legal, political and demographic status of the occupied Palestinian territory, and undermine the two-state solution.

The OIC strongly rejected the Israeli decision, saying it threatens the existence of the Palestinian people and violates their legitimate rights. These rights include the right to self-determination and to establish an independent sovereign state within the borders that existed before the 1967 war, with East Jerusalem as its capital.

The measures are considered "null and void” under international law and relevant U.N. resolutions, including U.N. Security Council Resolution 2334, the organization said.