The Osaka-based cryptocurrency exchange discovered hack two days ago, and is working to secure funds to reimburse affected users.

Japanese cryptocurrency exchange Zaif announced today that it lost $60 million worth of company and user funds during a security incident that took place last week.

The company said it discovered the hack on Monday, September 17, and confirmed it a day later, when it reached out to authorities and reported the incident.

The Zaif team suspended user deposits and withdrawals earlier today, while its staff is making sure the hacker(s) is out of their network for good.

Investigators are still gathering details, but Zaif said the hack took place on September 14, between 17:00 and 19:00 local time, when the attacker siphoned off three types of cryptocurrencies from the company's "hot wallets."