Another digital currency exchange has fallen victim to a cyberattack.

Hong Kong-based Gatecoin was forced to shut down the exchange and its ports last May 9 after discovering a “potential leak” on its hot wallets, CoinDesk reported.

“On Monday night HKT [Hong Kong time], May 9, we experienced a disruption of our service caused by a server reboot and so far, we strongly believe that the breach is linked to this event,” Gatecoin announced in its website.

The breach in system caused the digital currency exchange to lose as much as 185,000 ethers and 250 bitcoins, worth an estimated $2.14 million. The missing cryptocurrency makes up 15 percent of the total crypto-assets held by Gatecoin.