North Korea likely no longer want talks with the U.S., an influential adviser to South Korean President Moon Jae-in said Friday, warning that Pyongyang has now also lost interest in denuclearization.

Speaking during a press briefing on Friday, Moon Chung-in -- who serves as a special adviser to South Korean President on foreign affairs and security -- said a recent tell-all memoir by a former top U.S. official may have convinced the DPRK that diplomacy was no longer worthwhile.