More woes at Volkswagen

Volkswagen's top two managers are being investigated over allegations of market manipulation, deepening the carmaker's legal woes in connection with the diesel scandal.

CEO Matthias Mueller and Chairman Hans Dieter Poetsch, along with former CEO Martin Winterkorn, are being probed by Stuttgart prosecutors over whether they were too slow in telling Porsche shareholders about VW's emissions cheating, said a person familiar with the matter, who asked not to be identified.

Porsche owns the majority of VW's voting stock, and the men at the time had dual roles at the holding company and Volkswagen.

Poetsch, Winterkorn and another executive at the automaker already are being investigated in a separate German probe over possible manipulation of VW stock linked to the crisis.

VW is facing a barrage of investigations, lawsuits and customer complaints around the world after admitting in September 2015 that it rigged 11 million diesel vehicles to cheat on emissions tests. The scandal has cost it $24.6 billion in fines and other expenses so far, and the final tally remains unclear.