The U.K. Serious Fraud Office this week initiated criminal proceedings against two U.K. subsidiaries of French engineering company Alstom concerning allegations of bribery and corruption.

Alstom Network U.K., formerly called Alstom International, a U.K. subsidiary of Alstom, has been charged with three corruption offenses in violation of the Prevention of Corruption Act, as well as three offenses with conspiracy to corrupt in violation of the Criminal Law Act.

The alleged offenses are said to have taken place between June 2000 and November 2006 and “concern large transport projects in India, Poland, and Tunisia.” The SFO did not provide any further details, but the charges reportedly are connected to the arrests of three Alstom board members in the U.K. over allegations of bribery, money laundering, and false accounting.

“Significant developments are imminent—charges are imminent,” David Green, head of the SFO, told Reuters. “A number of individuals are of acute interest in the investigation.”

The first hearing in the case is schedule to take place at Westminster Magistrates’ Court on Sept. 9, 2014.