WASHINGTON- The United States is imposing sanctions on one person and his network of companies for providing assistance to Iran's ballistic missile program, the Treasury Department said on Wednesday.

Mohammad Ali Hosseini, an Iran-based procurement agent, and the companies procured ballistic missile propellant-related materials for a unit of the Islamic Revolutionary Guard Corps that is responsible for the research and development of ballistic missiles, Treasury said in a statement.

The sanctions also target Iran's Parchin Chemical Industries, Treasury said. (Reporting by Chris Gallagher)