Georgia Governor Brian Kemp has accused Republican challenger David Perdue of illegally coordinating with a new fundraising committee.

The Hill reports:

The complaint, filed with the Georgia Government Transparency and Campaign Finance Commission, accuses the fundraising committee Georgia Values Fund of asking donors to provide cellphone numbers to receive Perdue campaign updates and news, as well as to send contributions directly to the former senator’s campaign.

“In light of these facts, the Commission should take immediate action to investigate Perdue for Governor, Georgia Values Fund, and their agents, and take all appropriate action to halt such behavior and assess appropriate penalties under Georgia law,” the complaint reads.

In Georgia, independent committees such as Georgia Values Fund may raise and spend unlimited amounts of money to advocate for the election or defeat of a particular candidate. However, they are barred from directly coordinating their efforts with a candidate’s campaign.

A spokesperson for Gov. Kemp’s re-election campaign said that the alleged violation is a part of a larger pattern of unethical behavior by Perdue.

“From shady stock trades to blatant campaign finance law violations, David Perdue has a long history of breaking the rules to benefit himself,” Hall said. “The Perdue campaign’s actions are clearly against the law, and directly reflect the repeated lack of ethical conduct by Perdue himself.”

A spokesperson for Perdue’s campaign called the ethics complaint “laughable and desperate,” adding that because the former senator “is not associated with any state [political action committees],” his campaign “can’t speak to the independent activities of outside groups.”

Perdue and Kemp are locked in an intense primary battle to determine will go up against the likely Democrat gubernatorial nominee, Stacey Abrams.