German prosecutors have charged four Audi executives for allegedly overseeing engine software designed to cheat emissions tests, according to news outlet Reuters.
Three of the men were board members at the luxury automaker, while the fourth was previously the head of a department.
German prosecutors claim they were involved in deceptive conduct, and have charged the group with fraud, false certification, and criminal advertising.
In 2015, Volkswagen Group admitted 11 million of its diesel models across a number of brands were developed in order to side-step strict emissions regulations.
It's estimated the scandal has cost the Germany car company nearly $47 billion in fines, compensation payouts, and vehicle buy-back programs.
Last month it was revealed multiple offices belonging to Fiat-Chrysler were raided across Europe in a separate probe by German authorities into emissions cheating, suggesting the fraudulent practices may not be contained to the Volkswagen Group.
MORE: The Dieselgate Scandal