Oy. Picture released by DPRK state media.

South Korea vows ‘merciless’ response to North’s missiles http://t.co/cfumy8Thx7 pic.twitter.com/dE9iWyaAPf

— AJE News (@AJENews) May 11, 2015

South Korea has said that North Korea’s recent test-firing of a ballistic missile from a submarine was “very serious and concerning”, and that it will respond “mercilessly” to the threat.

Pyongyang’s official KCNA news agency said on Saturday North Korea’s leader, Kim Jong-un, oversaw the test-launch of the missile from an offshore location. Such a development could pose a new threat to the isolated country’s neighbours and the United States.

“(South Korea) will completely sever the chain of provocations by mercilessly dealing with any provocations,” South Korean Defence Minister Han Min-koo said in an emergency security meeting held on Monday to discuss the latest test, the Yonhap news agency reported.