London (CNN Business) Volkswagen CEO Herbert Diess and the company's chairman, Hans Dieter Pötsch, were charged by German prosecutors on Tuesday with stock market manipulation tied to the carmaker's diesel emissions scandal.

The two executives are accused of failing to disclose the huge financial risks of the diesel scandal to shareholders in a timely fashion.

Volkswagen VLKAF New charges against Martin Winterkorn , the former CEO of, were also revealed in an indictment running to nearly 640 pages.

Under German law, top executives must inform shareholders of information that can affect stock prices — such as considerable financial risks — as soon as they become aware of them.

In a statement, prosecutors accused all three men of failing to carry out their duty to investors.

Herbert Diess, CEO of Volkswagen AG, was charged on Tuesday.