The US Department of the Treasury's Office of Foreign Assets Control (OFAC) has sanctioned two senior Iranian defence officials for supporting Iran's ballistic missile programme.
The officials include Morteza Farasatpour, who coordinated the sale and delivery of explosives and other materials for Syria's Scientific Studies and Research Center (SSRC) on behalf of Iran's Defense Industries Organization (DIO), and Rahim Ahmadi, who was involved in the missile programme.
Additionally, the OFAC imposed sanctions on a China-based network for supplying missile-applicable items to Iran's military and an Iran-based entity that is assisting the programme.
US Treasury Secretary Steven T. Mnuchin said: "This administration is committed to countering Iran's destabilising behaviour, such as Iran's development of ballistic missiles and support to the Assad regime.
"It is alarming that individuals involved with Iran's missile programme are assisting the brutal Assad regime, and we are taking action to curtail this behaviour.
"These sanctions target Iranian officials as well as a China-based network that are providing support to Syria and supplying items to further Iran's ballistic weapons programme. The US will remain vigilant when it comes to Iran."
The OFAC said that Ruan Runling, a Chinese national, three associated Chinese companies and Iran-based Matin Sanat Nik Andishan were also sanctioned for supporting the development of ballistic missiles in Iran.
Since at least 2011, Matin Sanat has worked to procure a range of ballistic missile-applicable technology and metals for Shahid Hemmat Industries Group (SHIG) in Iran.
Matin Sanat has also conducted transactions with SHIG's parent company, AIO.