Russian crypto exchange Grinex said Thursday that it was hacked for more than 1 billion rubles, or around $13 million in funds.

The firm, which has been linked to the sanctioned and seized exchange Garantex, alleged the exploit was conducted by “Western special services,” according to an official statement made to its Telegram channel that was translated by Google. 

“The leading cryptoruble exchange Grinex, which provides settlements between Russian businesses and citizens in digital assets, was subjected to a large-scale cyberattack with signs of the involvement of foreign special services,” the firm posted. 

“Digital traces and character attacks testify to an unprecedented level of resources and technologies…