Four men, two of whom are Democratic city council members, have been charged with running a voter fraud operation in the town of Paterson, New Jersey.

New Jersey Attorney General Gurbir Grewal announced charges of mail-in voting fraud, election fraud, and illegal possession of mail-in ballots against Michael Jackson, Alex Mendez, Shelim Khalique, and Abu Rayzen.

Jackson is an active city councilman, while Mendez is a councilman-elect. Khalique is the brother of another Paterson city councilman, and Rayzen is a campaign operative for Khalique’s brother, Shahin Khalique.

The charges allege that Jackson took it upon himself to pick up completed mail-in ballots from voters in the city and delivered them to the Passaic County Board of Elections. Jackson failed to disclose to the board of elections that he delivered ballots for that he’s a city council member, and in one case, a ballot that he picked up that was unsealed was delivered to the election authorities sealed and completed.

Mendez is also accused of the same form of dishonest ballot harvesting, declining to reveal that he was a candidate for office when dropping off mail-in ballots. He’s also charged with falsifying and tampering with records.

Although they’re rarely enforced, New Jersey laws criminalizing election fraud have strict penalties, and it’s possible that the men could face prison sentences of up to ten years if they’re convicted of the second-degree felonies of which they’re charged.

A state investigation into the recent Paterson city election spurred the criminal charges, with AG Grewal revealing that 20% of the ballots filed in the election were fraudulent.