Attorneys representing the bankrupt cryptocurrency exchange FTX sued the company’s founder Sam Bankman-Fried and other former executives Thursday, arguing that the company leaders misappropriated hundreds of millions of dollars as part of a massive fraud scheme.

The lawsuit, which was filed as an adversary proceeding on the docket of the FTX bankruptcy case in Delaware, accused Bankman-Fried and his former colleagues Caroline Ellison, Gary Wang and Nishad Singh of “abus[ing] their control over the FTX Group to commit one of the largest financial frauds in history.”