Federal investigators believe Russian hackers were behind cyberattacks on a contractor for Florida's election system that may have exposed the personal data of Florida voters. The [cyberattack] comes on the heels of hacks in Illinois, in which personal data of tens of thousands of voters may have been stolen, and one in Arizona, in which investigators now believe the data of voters was likely exposed. Several states have reported attempted scans of their computer systems, which often is a precursor to a breach. The vendor hack in Florida prompted the FBI last week to coordinate an emergency call with county election supervisors who operate the election system in the perennial battleground state. FBI investigators believe the the hacks and attempted intrusions of state election sites were carried out by hackers working for Russian intelligence. The cyberattacks on election registration sites are focused on parts of the US election system that wouldn't affect the votes cast or the vote counts, according to US officials. Instead, the intruders are targeting registration systems. In a statement last Friday, the Director of National Intelligence and the Homeland Security Department formally [blamed] Russia for hacking political organizations, including the Democratic National Committee, and orchestrating the release of private emails in an attempt to meddle in the US elections.