SEOUL, Jan. 6 (UPI) -- A South Korean Defense Ministry study indicates North Korea has made progress toward building nuclear warheads capable of delivery by missile. "North Korea's capabilities of miniaturizing nuclear weapons appear to have reached a significant level," it said, although a ministry official acknowledged there is no intelligence information to support that conclusion, the South Korean Yonhap News Service reported Tuesday.
The official said it has been eight years since North Korea conducted its first nuclear test, enough time to develop appropriate technology for a missile-launched warhead. Pyongyang has conducted three nuclear tests, most recently in 2013.