At least three current and former employees of Georgia’s state ethics commission have received grand jury subpoenas related to a complaint filed against Georgia Gov. Nathan Deal’s (R) 2010 campaign, the Associated Press reported Thursday.

The grand jury, scheduled to meet next month, will receive documents relating to an ethics investigation that cleared Deal of major wrongdoing. Deal’s campaign agreed to pay $3,350 in fees over violations to the state’s campaign finance and disclosure laws.