North Korea fired two short-range ballistic missiles toward the East Sea, after re-deploying a nuclear-powered US aircraft carrier off the coast of South Korea.
This comes one day after South Korea and the United States staged joint air drills, involving B-1B bombers, in response to the North's long-range missile launch.
The Joint Chiefs of Staff (JCS) said it detected the launch from the Sukchon area in South Pyongyang Province between 6:01 am and 6:23 am (local time), and that the missiles flew some 390 kms and 340 km, respectively, Yonhap News Agency reported.
Hours after the launch, the North's official Korean Central News Agency (KCNA) reported that the artillery unit of the Korean People's Army fired two shots from the 600-mm multiple rocket launcher during firing drills, and that they flew 395 km and 337 km, respectively.
Leader Kim Jong Un's sister, Kim Yo Jong, issued yet another warning and bristled at the United States for trying to turn the UN Security Council into what she called a "tool for its heinous hostile policy" toward Pyongyang.
"I warn that we will watch every movement of the enemy and take corresponding and very powerful and overwhelming counteraction against its every move hostile to us," she said in a statement.
On Sunday, the allies carried out the air drills, involving the US bombers and South Korean F-35A stealth jets, as the North launched what it claimed to be a Hwasong-15 intercontinental ballistic missile (ICBM) the previous day.