South Korean President Moon Jae-in has called on the US Government to resume deliveries of additional terminal high-altitude area defence (THAAD) launchers.
The decision was made in response to a recent intercontinental ballistic missile launch by North Korea, media sources reported.
Currently, two of the six THAAD launchers have already entered operational service at a new US Forces Korea base in Seongju, 300km southeast of Seoul, according to Yonhap News Agency.
The US has also geared up to install the remaining parts of the THAAD system in South Korea, the news agency reported citing US Department of Defense spokesman Navy captain Jeff Davis.
Davis added: “We made an alliance decision with the Republic of Korea government last year to deploy THAAD to the Korean Peninsula as a defensive measure.
"We have gotten that to an initial missile defence ability just within the past few months.
"We are certainly ready to bring additional pieces in as quickly as we can.”
In June, Jae-in announced his decision to temporarily suspend the deployment of the THAAD system in the country until an environmental impact assessment had been completed.
The suspension halted the installation of the four additional launchers.
South Korea Ministry of National Defense spokesman Moon Sang-gyun was quoted by Yonhap as saying: "As for the deployment of six (THAAD) launchers, South Korea and the US will make a decision after consultations.
"Such discussion is currently going on, but further consultations are needed for the specific issues of when and how."