Binance, the world's largest crypto exchange, began letting customers withdraw funds again on Sunday, CNBC and AFP reported. Withdrawals had been frozen since the record hack of about $6.3 billion in token assets.

The exchange is reopening in phases, starting with the bitcoin network, the two outlets reported. It later restored withdrawals on the Ethereum network and BNB Smart Chain, CNBC said. Binance said it was putting tokens in order based on user demand over the past week, AFP reported.

On Saturday, Binance said it had covered up to 90% of the stolen assets, CNBC reported. It said 10 major tokens, including bitcoin, ether, tether, BNB, solana and XRP, are now fully backed. The rest are smaller tokens outside its top 10 that may take longer to buy back, the exchange said, according to CNBC.

Binance said it will keep buying the missing tokens until every one is fully covered, CNBC reported. The money comes from its emergency user fund, part of its futures insurance fund and its company treasury, the outlet said. AFP reported that Binance has set aside more than $6.34 billion of its own funds to cover the losses.

"Binance will absorb the financial impact of these stolen funds, not our users," the exchange said, CNBC reported.

Late Saturday, the FBI said North Korea was responsible for the theft, the two outlets reported. AFP said the finding confirmed earlier claims by private investigators.

News of the attack sent most major cryptocurrencies sharply lower on Friday, AFP reported.

What we know: Withdrawals are coming back in phases, and Binance says most stolen assets are covered.
What we don't: When every token will be fully restored, or how much the hackers will be able to keep.