The Trump administration on Tuesday imposed a new round of sanctions targeting Iran, blacklisting six companies and four people accused of facilitating the procurement of sensitive goods for an Iranian military firm. 

“The Iranian regime utilizes a global network of companies to advance its destabilizing military capabilities,” Treasury Secretary Steven Mnuchin said in a statement. “The United States will continue to take action against those who help to support the regime’s militarization and proliferation efforts.”

Iran Communication Industries, which was already sanctioned by both the United States and European Union, produces military communication systems, avionics, information technology, electronic warfare and missile launchers, according to the Treasury. The department accused a number of companies based in Iran, Hong Kong, China and Brunei of facilitating the transaction of US-origin electronic components and other goods on behalf of Iran Communication Industries.

In addition, a Taiwanese individual and international organizations DES International and Soltech — all blacklisted Tuesday — were charged in the US District Court for the District of Columbia with criminal conspiracy to violate Iran sanctions.