North Korean leader Kim Jong Un said a U.S.-South Korea joint military exercise could "ignite a war" and called for the rapid expansion of Pyongyang's nuclear capabilities.

North Korean leader Kim Jong Un supervised the test-firing of two types of new antiair missiles, state media said Sunday, displaying his expanding military capabilities as the South Korean and U.S. militaries carry out joint drills.

SEOUL, South Korea — North Korean leader Kim Jong Un condemned South Korean-U.S. military drills and vowed a rapid expansion of his nuclear forces to counter rivals, state media said Tuesday, as he inspected his most advanced warship being fitted with nuclear-capable systems.