File Photo: A Sayad-3 missile during the unveiling of the Arman defense systems at an undisclosed. AFP
Washington said it was targeting 21 companies and 17 individuals who "pose a significant threat to US service members in the Middle East, US commercial ships transiting international waters, and civilians."
The move, it added, follows the United Nations' September 27 decision to reimpose sanctions and restrictions on Tehran's nuclear, missile, and other armed programs.
The designations are the first to be imposed by the Trump administration since the so-called "snapback" sanctions were finalised last week, which will ramp up the pressure on Tehran over its nuclear weapons and ballistic missile programs.
The networks targeted are based in several countries, including Iran, Hong Kong, China, and Germany, the US Treasury Department said.
"Under President Trump's leadership, we will deny the (Iranian) regime weapons it would use to further its malign objectives," US Treasury Secretary Scott Bessent said in a statement.
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