According to Foresight News, CZ comments on Twitter that the initial analysis of the hacker attack on Ankr is developer private key hacked and smart contract tampered to a malicious one. Binance has halted withdrawals hours earlier and frozen $3M worth of assets transferred to Binance by hacker.
In addition, Binance states on Twitter that it will start maintenance on the BNB Chain at 15:00 Beijing time today and suspend the deposit and withdrawal of BEP-20 tokens on the BNB Chain for about 2 hours.