Israel will cease all contact with the UN's Palestinian relief agency UNRWA and any other body acting on its behalf, Israel's envoy to the UN said Tuesday after repeatedly accusing the organization of undermining its security.

Implementation of a ban on the U.N. Palestinian relief agency UNRWA in Israel - due to start on Thursday - will be disastrous, the UNRWA chief told the Security Council on Tuesday, as the United States accused it of being "irresponsible and dangerous.

UN Secretary-General António Guterres has called on the Israeli government to revoke its decision mandating the cessation of all operations by the United Nations Relief and Works Agency for Palestine Refugees (UNRWA) in Jerusalem and the evacuation of its premises by the end of Thursday.