Almost 50 UN human rights experts have condemned Israel's plan to annex parts of the occupied West Bank, calling it a "vision of a 21st Century apartheid".
Such a move would violate international law and leave what would amount to "a Palestinian Bantustan", they warned.
Prime Minister Benjamin Netanyahu says in July he may start the process of applying Israeli sovereignty to Jewish settlements and the Jordan Valley.
Such a move was effectively green-lighted by Donald Trump's peace plan.