US warns North Korea against nuclear attacks

"The U.S. side reiterated that any nuclear attack by the DPRK against the ROK will be met with a swift, overwhelming, and decisive response," the statement said.

The second U.S.-Republic of Korea Nuclear Consultative Group (NCG) convened in Washington on Friday for talks on nuclear deterrence as part of a commitment by the two countries to share more insight into planning in the event of conflict with North Korea. Pyongyang has developed and tested a range of ballistic missiles that can reach targets in South Korea, Japan and the U.S. mainland.

Kim Tae-hyo, South Korea's deputy national security adviser said on Friday that North Korea may test-launch an intercontinental ballistic missile this month, which was considered a nuclear threat regardless of its range because it can carry a nuclear warhead.

The third NCG will be convened in Korea next summer.