North Korea is poised to fire short-range missiles on either side of its territory, Yonhap News Agency cited an official as saying on Friday.
Joint reconnaissance military assets of South Korea and the US detected the moves of North Korean mobile rocket launchers, mounted with Scud and Rodong missiles, reported Xinhua.
The short-range Scud missiles were detected in North Korea, while the medium-range Rodong missiles were found moving in the western region.
The Scud is known to have a range of less than 500 km, while the Rodong has a maximum range of 1,200 km.