The diesel emissions scandal has yet to turn a new chapter, as it appears that Porsche and Audi facilities have been raided by German prosecutors as part of ongoing investigations relating to Dieselgate. The collective involvement of Porsche and Audi was first discovered in 2015, when the 3.0 litre TDI V6 engines from the brands were suspected of having emissions control defeat devices installed to get around US EPA emissions testing.

Three people including a Porsche management board member, a Porsche senior manager and a former Porsche employee have come under suspicion following a raid by German public prosecutors at 10 Porsche properties, according to German publication Handelsblatt. The prosecutors did not release the names of those suspected.

“We confirm that investigators today inspected and secured documents at the offices of Porsche AG in Stuttgart and Audi AG in Ingolstadt. Audi AG and Porsche AG are co-operating fully with the investigating authorities. Please appreciate that we can’t comment on further details due to the ongoing investigation,” Porsche said in a statement.

In February, Porsche reportedly dropped all diesel-engined models from its product line-up. Elsewhere, changes at the board of the larger Volkswagen Group have also taken place – Herbert Diess succeeds Matthias Müller as chairman of the board at Volkswagen, while Porsche CEO Oliver Blume has been appointed to the group board of management.

Despite the huge corrective undertaking in the aftermath of the scandal, Volkswagen still managed to take the global sales lead for 2016, and then outdoing itself the following year.