NEW YORK - More than a dozen MTA workers have been charged in an exam cheating scandal.

NBC is reporting that nine conductors and four engineers are accused of emailing photos of Metro-North safety tests to conductor candidates.

They were all charged with impairing the integrity of a government licensing examination.

According to NBC, the MTA said none of the 13 staffers charged Monday had been in passenger service since the agency was notified they would be arrested.