Washington ? Federal agents on Monday raided a Georgia peanut processing plant linked to the nationwide salmonella outbreak that has prompted one of the largest product recalls in U.S. history.

The FBI executed search warrants at both the plant in Blakely, Ga., and at Peanut Corp. of America’s headquarters in Lynchburg, Va., according to a senior congressional aide with knowledge of the raids. The official spoke only on condition of anonymity because he was not authorized to speak publicly on the matter.

The plant has been identified as the source of the salmonella that has sickened hundreds and killed as many as eight people.

Atlanta television station WSB’s cameras captured FBI agents entering the plant and leaving with boxes and other material.

Earlier Monday, Agent Gregory Jones in Atlanta said the FBI had joined the investigation into the outbreak. The FBI didn’t immediately return a message left seeking further comment on the raid Monday night.