Dozens of California Highway Patrol officers are being temporarily relieved of duty amid an investigation into whether they fraudulently received hundreds of hours of overtime pay while working out of the East Los Angeles station, officials said Friday.

The probe found evidence that some officers exaggerated the number of hours they worked in protection details for Caltrans workers doing freeway maintenance. CHP officers can earn lucrative overtime for this type of work. The job typically involves sitting in a cruiser at each end of a construction zone to ensure motorists don’t get too close to the workers.