The ministry said additional launchers, based on consultations between Korea and the United States, will be moved to the base along with the construction materials.
Seoul announced the deployment of four additional US Terminal High Altitude Area Defense (THAAD) missile systems in North Gyeongsang Province following the recent nuclear test by Pyongyang, local media reported Wednesday.
The United States is considering, in addition to other options, stopping all trade with any country doing business with North Korea.
Defense Secretary Jim Mattis and South Korean Defense Minister Song Young-moo spoke yesterday to discuss North Koreas Sept. 2 test of a nuclear device, chief Pentagon spokesperson Dana W. White said.
Their conversation came days after North Korea's latest and most powerful nuclear test.
South Korean local residents are protesting against the US THAAD deployment missile systems.
Trump has offered "conceptual approval" on the purchase of billions of dollars' worth of USA military weapons and equipment by South Korea.
The United States and South Korea are moving forward with plans to install four more Terminal High Altitude Area Defense (THAAD) rocket launchers at a US base in Seongju, in spite of widespread opposition and protests from local residents and activists.
Trucks carrying THAAD equipment head to the missile defense system's deployment site in Seongju, some 300 kilometers south of Seoul, on September 7, 2017.
There are now two launchers at the location, a former golf course.
The placing of additional THAAD launchers will likely trigger an angry response from area residents and activists who have opposed the system.
The system has a radar that can see deep into Chinese territory.
"We call on all interested parties to take a closer look at this initiative which, in our view, offers a realistic way to reduce tensions and gradually approach a settlement", Putin said on Wednesday.
Since 2008, photographer Eric Lafforgue ventured to North Korea six times.
U.S. Ambassador Nikki Haley said during a U.N. Security Council meeting Monday that North Korea's leader "is begging for war".
He complimented Mr Putin and the Russian government over what he said were diverse efforts to find diplomatic solutions to the problem.
But Russia and China are opposed to the show of strength by the US and South Korea.