Hundreds of Orange County court cases are being scrutinized amid suspicions that someone was paid to fix DUI and other traffic violations by falsifying court records.

The FBI and county prosecutors are investigating, and about 600 Superior Court cases, some dating to 2006, are going before a judge this month to determine whether they should be reheard, the Orange County Register reported.

The probe involves suspicions that some employees recorded fake sentence reductions and dismissals for drunken driving and misdemeanor traffic cases and in at least one case, falsely made it appear a defendant had served jail time, the Register reported.

No arrests have been made. Representatives for the FBI, the court and the county district attorney's office declined to comment.

On Friday, 110 attorneys and former criminal defendants were summoned to the courtroom of Judge Thomas Borris and told there were errors in the court records. "You are here to convince me there is not a mistake in your case," Borris said.

"There has been a clerk somewhere that was entering false information ... getting cash in exchange for making stuff disappear," said Sheny Gutierrez, one of the attorneys who appeared.

Ramon Vasquez said he was given a work program in 2012 after pleading guilty to driving on a suspended license. The judge said the case would be undone unless he produced documents, the Register said.