FOX News says North Korea is continuing to put new restrictions on United Nations relief organizations operating in the communist country.

The U.S. broadcaster said Tuesday that a spokesman for the World Food Program confirmed that last Friday the food agency was ordered to limit food deliveries to 57 of the 131 North Korean counties it previously served.

The agency said it was also ordered to give seven days' notice prior to visiting sites to oversee food deliveries --- a sharp change from the one-day notice previously required under a deal to retain U.S. support for North Korean relief efforts.

The report added that additional constraints were also slapped on the child relief organization UNICEF in June. A UNICEF spokesman told FOX News that Pyongyang banned UNICEF from operating in its northern province of Ryanggan, which borders China and is one of the impoverished country's poorest areas.