Seoul, March 16 ( /Sputnik) The launch of an unknown projectile by North Korea from the area of the Pyongyang Sunan airport presumably ended in failure immediately, the Yonhap news agency reported citing the Joint Chiefs of Staff of South Korea. Earlier, the NHK TV channel, citing sources in the Japanese Defense Ministry, reported that North Korea presumably fired a ballistic missile. This is the tenth missile launch by North Korea this year. /SPUTNIK ACL0806