The Department of Justice announced 18 charges against the operators of the 100,000-plus-ton cargo ship that crashed into Maryland’s Francis Scott Key Bridge more than two years ago, causing it to collapse and killing six people.

Federal prosecutors said they were charging the international companies Synergy Marine Pte Ltd and Synergy Maritime Pte Ltd, as well as ship technical superintendent Radhakrishnan Karthik Nair, with conspiracy, willfully failing to immediately inform the U.S. Coast Guard of a known hazardous condition, obstruction of an agency proceeding, and false statements.