South Korea used ballistic missiles in a live-fire exercise simulating an attack on the North's nuclear sitehandout (South Korean Defence Ministry/AFP)
The exercise launched 'designated targets in the East Sea,' according to the report in Yonhap News Agency
South Korea launched a ballistic missile exercise late Sunday in response to Pyongyang's provocative detonation of what it claimed was a miniaturised hydrogen bomb, state news agency Yonhap reported.
The South's military conducted a live-fire exercise simulating an attack on the North's nuclear site, hitting "designated targets in the East Sea," the report added, quoting the Joint Chiefs of Staff.
"The training came in response to the North's sixth nuclear test... and involved the country's Hyunmoo ballistic missile and the F-15K fighter jets," it said.
"The training demonstrates the South Korean military's resolve to destroy not only the origin of provocation but also the enemy's leadership and supporting forces if they threaten the security of our people," Army Col. Roh Jae-cheon, the army spokesman is quoted by South Korea's Yonhap news agency.
The South's military said the range to the simulated targets were "set in consideration of" the North's Punggye-ri nuclear test site in its northeastern province. Ballistic missiles were launched from both land and air.
US President Donald Trump Sunday criticized Seoul.
South Korea, Trump said, "is finding, as I have told them, that their talk of appeasement with North Korea will not work, they only understand one thing!"
The United States warned it could launch a "massive military response" to threats from North Korea.