Japanese automaker Nissan says it has determined that its chairman, Carlos Ghosn, falsified reports about his compensation "over many years." The company said its internal investigation also found Ghosn had used company assets for personal purposes.
Japanese media are reporting Monday that Ghosn is being questioned by Tokyo prosecutors on allegations that he underreported his income and that he will likely be arrested.
Ghosn is suspected of failing to report hundreds of millions of dollars in income.
Nissan says Ghosn will be dismissed from the company.
The Ashai newspaper reported that prosecutors have raided Nissan's headquarters in Yokohama.
The Brazilian-born Ghosn, who is of Lebanese descent and a French citizen, was the rare foreign top executive in Japan.
Ghosn was sent to Nissan in the late 1990s by Renault SA of France, after it bought a controlling stake of Nissan. He is credited with rescuing Nissan from the brink of bankruptcy.
In 2016, Ghosn also took control of Mitsubishi, after Nissan bought a one-third stake in the company, following Mitsubishi's mileage-cheating scandal.
"If he is arrested, it's going to rock the Renault-Nissan-Mitsubishi alliance as he is the keystone of the alliance," said Satoru Takada, an analyst at TIW, a Tokyo-based research and consulting firm.
Shares in Renault fell more than 12 percent in late morning trading in Paris after the news about Ghosn came out.