Teams of FBI agents descended Thursday on the Hammond Police Department and Tangipahoa Parish Sheriff's Office.
"We are conducting multiple court-authorized actions," said Craig Betbeze, a spokesman for the FBI's New Orleans field division. "The investigations are ongoing."
The raid, according to three law enforcement officials, is related to a broader federal investigation of a drug task force that has come under scrutiny for allegedly selling confiscated narcotics and tampering with witnesses.
The task force included several members of the Tangipahoa Parish Sheriff's Office, and it was led by Chad Scott, a special agent with the U.S. Drug Enforcement Agency who has been suspended from duty as a result of the probe.
Two former members of the task force have been charged with stealing cash and drugs during raids.
The sheriff in Tangipahoa is Governor Edwards's brother.