Munich prosecutors investigated the offices of Volkswagen CEO Matthias Mueller as part of an investigation concerning diesel emission test cheating at Audi, Bild am Sonntag reported.
Some 100 officials investigated Audi’s headquarters located in Ingolstadt, Germany, and its Neckarsulm plant last week, along with the Wolfsburg base of Audi’s parent Volkswagen.
Bild am Sonntag stated prosecutors targeted 47 Volkswagen workers such as Mueller and Audi CEO Rupert Stadler, looking into personal calendars, notebooks and even memory cards in smartphones.
Mueller was targeted due to his role as supervisory board chairman at VW’s premium car unit Audi, the report said.
Volkswagen was not currently available for remark.