Bitfinex, a global digital currency exchange, paused trading last week when it experienced a distributed denial-of-service attack. During the pause in trading, it announced to users that “Bitfinex is currently under extreme load. We are investigating the issue and will keep you all up to date as we learn more.”

The company resumed trading after maintenance and was “monitoring the situation closely.” It stated that “[T]he attack only impacted trading operations, and user accounts and their associated funds/account balances were not at risk at any point during the attack.”

Bitfinex previously suspended trading in August of 2016 when an intruder stole 120,000 bitcoins.