(AP) — Two notorious conservative activists have been charged with multiple felonies in Michigan for a series of false robocalls that aimed to dissuade urban residents in Detroit and other cities from voting by mail.

Jacob Wohl, 22, and Jack Burkman, 54, each were charged Thursday with four felony counts in Detroit, including intimidating voters in violation of election law, conspiracy and using a computer to commit crimes.

The calls falsely warned residents in majority-Black Detroit and urban areas in at least four other states that voting by mail in the Nov. 3 election could subject people to arrest, debt collection and forced vaccination.

In August, the men denied involvement. Michigan Attorney General Dana Nessel says the pair created and funded them.

Illinois Attorney General Kwame Raoul warned residents in September to be on alert for robocalls with false claims about voting by mail in the upcoming election, advising anyone with questions about voting by mail to contact election authorities.

Voters had reported receiving calls with an automated recording falsely claiming that voting by mail could result in their private information being given to third parties like “the Centers for Disease Control and Prevention to track people for mandatory vaccines, police departments and law enforcement in order to locate individuals who have outstanding warrants, and creditors to help find people who owe outstanding debt,” Raoul said in a statement.