North Korea says it's closing a communications channel with the U.S. in New York. And it plans to destroy a U.S. missile system being deployed to South Korea.

Fox's Alastair Wanklyn reports from the Asia Bureau:

North Korea saying it'll attack the U.S. high-altitude anti-missile battery as soon as its location in South Korea is known.

Pyongyang also saying it may treat U.S. detainees more harshly from now on, subjecting them to, quote "military law."

China today said deploying the U.S. THAAD anti-missiles to South Korea, would worsen security in the region.

But South Korea's defense minister saying Seoul doesn't care what other nations think, for South Koreans this is a question of survival.

In the Asia Bureau, Alastair Wanklyn, FOX News.