Indiana State Police investigators raided a voter registration agency in Indianapolis on Tuesday, as its voter fraud case has expanded to nine counties.

"Information has expanded from the original involved counties of Hendricks and Marion to also include the counties of Allen, Delaware, Hamilton, Hancock, Johnson, Lake and Madison," the Indiana State Police said in a statement.

According to police, the investigation began in late August when they learned of the filing of 10 fraudulent voter registration forms in Marion and Hendricks counties.

The results of the search of the Indiana Voter Registration Project in downtown Indianapolis are not yet being released, and the affidavit and search warrant remain sealed for 30 days.

"An investigation of this nature is complex, time consuming and is expected to continue for several more weeks or months," the Indiana State Police said. "Victims of the activities by some agents of the Indiana Voter Registration Project may not discover they have been disenfranchised from voting until they go to vote and realize their voting information has been altered. Such action may result in the citizen having to cast a provisional ballot."

According to the Indy Star, the possible fraudulent information is a combination of fake names, addresses and dates of birth combined with real information.

Police think the number of fraudulent voter records may be in the hundreds due to the large number of counties involved.