U.S. prosecutors have charged nine people over their alleged roles in a hacking scheme to obtain corporate press releases before they were made public, a network which they said generated $100 million of illegal trading profit.

Prosecutors in Brooklyn, New York made public an insider trading indictment charging four traders: Vitaly Korchevsky, a former hedge fund manager from Glen Mills, Pennsylvania; Vladislav Khalupsky, of Brooklyn and Odessa, Ukraine and Leonid Momotok, of and Alexander Garkusha of Georgia.