ATLANTA (AP) -- A federal grand jury has indicted four people in a 2009 salmonella outbreak linked to a Georgia peanut processing plant.

The indictment unsealed Wednesday in federal court in Georgia charges four employees with Virginia-based Peanut Corp. of America.

The charges include conspiracy, wire fraud, obstruction of justice and others related to contaminated or misbranded food.

The company's filthy processing plants were blamed for the outbreak that killed nine people and sickened hundreds. The company later went bankrupt.

Named in the indictment were company owner Stewart Parnell, vice president Michael Parnell, Georgia plant manager Samuel Lightsey and Georgia plant quality assurance manager Mary Wilkerson.