SEOUL, May 30 -- South Korea's military on Monday said it was tracking the possible ballistic missile launch by the Democratic People's Republic of Korea (DPRK) after a Japanese broadcaster's report on the launch possibility.

An official at South Korea's Joint Chiefs of Staff (JCS) told Xinhua on the phone that it was trailing the signs of the DPRK's ballistic missile launch and has made complete preparations for possible launches.

The comments came after Japan's state broadcaster NHK reported that Japan had put its military on alert for possible DPRK ballistic missile launch to shoot down any projectile heading for Japan.

Japan's military reportedly advanced Aegis-equipped destroyers in the country's western waters and deployed Patriot PAC-3 anti-ballistic missile batteries in Tokyo and other sites to intercept possible projectiles from the DPRK.