Seoul, Rabi'I 15, 1436, Jan 6, 2015, SPA -- North Korea has likely reached a "significant level" of miniaturization of its nuclear warheads, dpa cited the Defence Ministry in Seoul as saying Tuesday. But since its last test explosion in 2013, "North Korea's capabilities of miniaturizing nuclear weapons appear to have reached a significant level", the white paper released Tuesday said, according to Yonhap News Agency. "We don't have any intelligence that North Korea has completed the miniaturization," an unnamed ministry official was quoted as saying. --SPA 11:54 LOCAL TIME 08:54 GMT www.spa.gov.sa/w