The Russian government has targeted the Arizona voter registration systems in 2016, the Department of Homeland Security has confirmed to Arizona Secretary of State Michele Reagan.

Reagan tweeted the news on Friday afternoon.

This isn't the first time Arizona has been warned about a 2016 security breach. Last August, the FBI told Arizona and Illinois that Russian hackers had tried to access voter information.

At the time, Reagan said hackers did not get any personal information and election results were not affected.

However, the information from DHS on Friday included many more states than the FBI's previous report.

According to DHS, Arizona was one of 21 states targeted in the hack, though in most cases the systems were not breached.

Illinois was the only state reporting that hackers succeeded in breaching its voter systems, the Associated Press reported.