The Trump administration has further suspended non-immigrant visas for Palestinian passport holders, according to a news report Monday.

The suspensions, which are temporary, were issued in an Aug. 18 cable from the State Department to all U.S. embassies and consulates and apply to visas for medical treatment, university studies, visits to friends or relatives and business, as first reported by The New York Times.

They mark an escalation from earlier administration restrictions on Palestinians seeking to enter the United States. How long the suspensions will remain in place is unclear.