ICC Chief Prosecutor Karim Khan has been accused of misconduct.
The ICC's governing body decided to conduct an internal investigation into him.
Khan, who is accused of alleged harassment, has been asked to temporarily step aside from his trial at the Hague war crimes court, Reuters reports.
Karim Khan has denied allegations of misconduct that were revealed in court last month.
He asked the court's internal oversight body to conduct an investigation.
However, the alleged victim in Khan's case is unsure of the independence of the investigation because of the leak.
The document also says that Khan is required to temporarily step aside and hand over his powers to one of his deputies.
It is not yet clear who exactly will conduct the investigation.
