Nissan Motor Co. Ltd has broadened its investigation into ousted Chairman Carlos Ghosn to include dealings that took place in the United States, India and Latin America, three people with knowledge of the inquiry said.

In one aspect of their internal probe, company investigators are looking into decisions made in the United States by Jose Munoz, who led Nissan's North American operations from 2014 to 2018, the people said. Munoz resigned from the company Friday, less than a week after the company announced he was taking a leave of absence due to the probe.

Munoz, Nissan's chief performance officer, resigned effective immediately, according to a post on his LinkedIn page and a company spokesman. The 53-year-old had reported directly to Chief Executive Officer Hiroto Saikawa and was responsible for Nissan's overall results and strategy.