Nissan Motor Co.'s internal investigation into former Chairman Carlos Ghosn's alleged financial misconduct has been completed and the results will be reported to its board meeting next week, sources close to the matter said Saturday.

Nissan, which will convene the meeting on Monday, will consider punishments for executives based on the findings and speed up the process of finalizing the amount of damages it will seek in a planned lawsuit against Ghosn, they said.

Ghosn, who led the automaker for two decades before his arrest in November last year, has claimed innocence.