The THAAD battery was initially deployed in March in the southeastern region of Seongju with just two of its maximum load of six launchers to counter a growing North Korean missile threat.
The announcement came as North Korean state media said leader Kim Jong Un had personally supervised Monday’s missile launches by an army unit that is positioned to strike US bases in Japan.
Despite Park offering to step down, the South Korean parliament insists on a vote that will decide whether or not the president will be impeached.
While the People’s Party has cautioned against a motion for impeachment without the support of the ruling Saenuri Party, the Democratic Party insisted on it
Park’s office has said she intends to fulfil her duties as president and has not formally acknowledged the calls to step down from the public and parliament.
These launches were seen as a show of force a week after South Korea and the US chose a site in the South to deploy the THAAD anti-missile against North.
China, which backed the latest UN sanctions against North Korea in March, objects to the proposed THAAD deployment in the South, as the system’s radar can reach into its territory.
Reports of North Korea’s successful Musudan missile launch have pushed the diplomatic community into action, with the UNSC seeking a united response to security concerns.
Pyongyang has said the Republican candidate was “not screwy or ignorant” and a “wise choice for president”.
Seoul rejected the proposal for military talks because it lacked a plan to end the Pyongyang’s nuclear programme.
North Korean leader Kim Jong Un supervised a successful test of a new engine for an intercontinental ballistic missile, state media said on April 9.