ST. LOUIS — St. Louis Circuit Attorney Kimberly M. Gardner added 22 more names Tuesday to a list of officers banned from bringing cases to her office, this time after a national research project accused them of making racist and anti-Muslim social media posts.

The total number is now almost 60, roughly 5% of the department’s force of about 1,100 commissioned officers.

Gardner sent a letter to Public Safety Director Jimmie Edwards and St. Louis Police Chief John Hayden on Tuesday informing them of the changes, saying that seven of the 22 officers are “permanently banned,” meaning her office won’t issue charges based on their investigations, won’t apply for search warrants they seek and won’t consider cases in which they are essential witnesses.

The work of the remaining 15 officers will be reviewed by Gardner’s office “to determine conditions and reinstatement of their ability to present cases,” according to a statement from Gardner’s spokeswoman, Susan Ryan.

Edwards was unavailable for comment.

Hayden’s office did not immediately respond to a request for comment.