GREENBELT, Md. — Eight young men have been charged for their alleged roles in a gang racketeering conspiracy that operated in the Maryland suburbs of Washington, D.C.

The U.S. Attorney’s Office said in a news release Wednesday that the men were named in a superseding indictment that a federal grand jury returned last month.

The men, who range in age from 18 through 22, are alleged to be members of MS-13. The indictment says they were members and associates of MS-13 who planned and committed homicides, drug and gun trafficking, and extortion.

The homicides included a slaying in March in Bedford County, Virginia.

Prosecutors say all eight men are in custody.