Local election officials in Arizona confirmed the nearly 2,900 voters who were previously flagged as needing proof of citizenship to vote in Tuesday’s election will ultimately be able to cast their ballots.

The last-minute decisions by officials in Maricopa and Pinal counties will allow 2,900 people to participate in the election despite not having provided valid proof of citizenship. Both counties said the affected voters were invalidated in error, blaming the Motor Vehicle Division’s automated system that was programmed to flag people who were part of a larger group of 218,000 driver’s license holders who lacked proof of citizenship.