Tensions on the Korean Peninsula are at their highest level in years as the pace of North Korea's missile tests and the joint US-South Korea military drills have both intensified in a tit-for-tat cycle
Russia and China are sending government delegations to North Korea this week to join commemorations of the signing of the armistice that ended fighting in the Korean War 70 years ago
The Joint Chiefs of Staff (JCS) said it detected the launches from the Sunan area in Pyongyang between 3.30 a.m. and 3.46 a.m., and they flew some 550 km before splashing into the sea, reports Yonhap News Agency.
Periodic visits by US nuclear ballistic missile-capable submarines to South Korea were one of several agreements reached by the two countries' Presidents in April in response to North Korea's expanding nuclear threat
The UN Command tweeted that the US citizen was on a tour to the Korean border village of Panmunjom and crossed the border into the North without authorisation