ATLANTA — A federal grand jury indicted four former employees of a peanut company linked to a 2009 salmonella outbreak that killed nine people and sickened hundreds, leading to one of the largest recalls in history.

The 76-count indictment was unsealed Wednesday in federal court in Georgia. It charged the former employees of Virginia-based Peanut Corp. of America with conspiracy, wire fraud, obstruction of justice, and other offenses related to contaminated or misbranded food.