emade explosive devices, including acetone and sodium bisulfate, as well as parts used for drones.

During the course of the investigation, the FBI says, he communicated with multiple informants - including one who purported to be a Houthi colonel - and provided advice and assistance on communications equipment.

Ellaboudy is charged under a law that makes it a crime to provide material support to a group designated by the United States as a foreign terrorist organization, of which the Houthis are one.

 These allegations are so deeply disturbing that they almost defy imagination,  John Eisenberg, the assistant attorney general in charge of the Justice Department's National Security Division, said in a statement.