A U.S. federal judge has permanently dismissed criminal charges against Indian billionaire Gautam Adani and Sagar Adani in a graft case. The judge approved the Department of Justice's decision to drop the criminal probe into the two men. The charges were related to alleged corruption. The dismissal brings the U.S. case against both individuals to a close. The court's action makes the dismissal final, ending the legal proceedings in the United States. The decision applies to both Gautam Adani, chairman of the Adani Group, and Sagar Adani. The exact nature of the allegations was not detailed in the court filings mentioned in the reports. The ruling marks the end of the U.S. justice department's investigation into the matter.