US Secretary of State Mike Pompeo has announced new sanctions on Iran’s Defense Ministry and other Iranian officials involved in the country’s nuclear and missile programs.

Pompeo told reporters on Monday that the US specifically slapped sanctions on two individuals who he claimed play an essential role in Iran’s uranium enrichment operations.

“The United States expects all UN Member States to fully comply with their obligations to implement these measures. In addition to the arms embargo, this includes restrictions such as the ban on Iran engaging in enrichment and reprocessing-related activities, the prohibition on ballistic missile testing and development by Iran, and sanctions on the transfer of nuclear- and missile-related technologies to Iran, among others,” Pompeo said.

“If UN Member States fail to fulfill their obligations to implement these sanctions, the United States is prepared to use our domestic authorities to impose consequences for those failures and ensure that Iran does not reap the benefits of UN-prohibited activity,” Pompeo said in a statement,” he added.

The statement came after Pompeo announced on Saturday that all UN sanctions against Iran were “back in effect” under the “snapback” mechanism of UN Security Council Resolution 2231. The mechanism envisages an array of punitive measures if Iran violates its obligations under the 2015 nuclear deal, also known as the Joint Comprehensive Plan of Action (JCPOA).