https://www.reuters.com/article/us-southkorea-northkorea-cryptocurrency/south-korea-spy-agency-tells-lawmakers-north-korean-hackers-possibly-behind-coincheck-heist-source-idUSKBN1FP2XO >South Korea's national spy agency told a parliamentary committee it was possible North Korean hackers broke into a cryptocurrency exchange in Japan to steal $520 million worth of digital coins, a person familiar with the matter said on Tuesday.