SEOUL (Reuters) - North Korea tested new tactical ballistic missiles using super-large warheads and modified cruise missiles on Wednesday led by leader Kim Jong Un, who called for stronger conventional weapons and nuclear capabilities, KCNA news agency reported.

North Korea tested new tactical ballistic missiles using super-large warheads and modified cruise missiles on Wednesday led by leader Kim Jong Un, who called for stronger conventional weapons and nuclear capabilities,

North Korea conducted a test of its underwater nuclear weapon system in response to the United States, Japan and South Korea's "joint military exercises," state-run media Korean Central News Agency said on Friday.