Bankrupt crypto exchange FTX’s new CEO, John Ray, took to Twitter Saturday to confirm that the exchange and its U.S. subsidiary, FTX US, were hacked last night in an attack that drained hundreds of millions of dollars in crypto out of the exchanges’ wallets.

Ray said FTX US and FTX.com “continue to make every effort to secure all assets, wherever located.” Ray added that FTX is “in the process of removing trading and withdrawal functionality and moving as many digital assets as can be identified to a new cold wallet custodian.” According to Ray, the company’s executives have been “in contact with, and are coordinating with law enforcement and relevant regulators” following the hack.