ChainCatcher reported that according to DLNews, the British cryptocurrency exchange Lykke closed trading, citing "unauthorized access" to its platform, which is the latest sign of cryptocurrency hackers using private keys.

Network researcher SomaXBT first reported the incident, saying that the exchange was closed two days after being hacked. MetaMask developer and cryptocurrency defense expert Taylor Monahan said the exchange had suffered $22 million in suspicious fund outflows.