The hacking of state and local election databases in 2016 was more extensive than previously reported, including at least one successful attempt to alter voter information, and the theft of thousands of voter records that contain private information like partial Social Security numbers, current and former officials tell TIME.
In one case, investigators found there had been a manipulation of voter data in a county database but the alterations were discovered and rectified, two sources familiar with the matter tell TIME. Investigators have not identified whether the hackers in that case were Russian agents.
The fact that private data was stolen from states is separately providing investigators a previously unreported line of inquiry in the probes into Russian attempts to influence the election. In Illinois, more than 90% of the nearly 90,000 records stolen by Russian state actors contained drivers license numbers, and a quarter contained the last four digits of voters’ Social Security numbers, according to Ken Menzel, the General Counsel of the State Board of Elections.