SEOUL - Moon Jae-in, president of the Republic of Korea, on Monday ordered an additional probe into the unreported deployment of four more mobile launchers of the US missile shield to the country.

Senior presidential press secretary Yoon Young-chan said that Moon ordered his senior secretary for civil affairs to look further into any suspicions over the installation of the Terminal High Altitude Area missile interception system.

Moon ordered an initial investigation last week into the "intentional" omission of report to the new leader about the deployment of four THAAD mobile launchers to an unidentified US military base in the country.