North Korea could own up to 45 nuclear arms by 2020 owing to an anticipated rise in its reserves of plutonium and enriched uranium and its growing pace of arms development, a South Korean expert said on Thursday.
Pyongyang is thought to currently possess around 280 kg of highly enriched uranium, said Lee Sang-Hyun, vice-president at the research planning division of the Sejong Institute, one of the country's most influential think tanks, Efe news reported.