The Donald Trump administration stepped up its sanctions on Iran this week as Tehran appeals for sanctions relief to cope with the coronavirus pandemic.

The Treasury Department sanctioned five United Arab Emirates-based companies for purchasing Iranian petroleum. And on Wednesday the United States announced sanctions on nine entities based in South Africa, Hong Kong and China for “significant transactions” in petrochemical trade with Iran as well as three Iranian individuals.

“The Iranian regime uses revenues from petroleum and petrochemical sales to fund its terrorist proxies like the [Quds Force] instead of the health and well-being of the Iranian people,” Treasury Secretary Steve Mnuchin said in a statement. “The Trump administration will continue to target and isolate those who support the Iranian regime and remains committed to facilitating humanitarian trade and assistance in support of the Iranian people.”

Why it matters:  Iran has blamed US sanctions for hindering its ability to cope with the coronavirus. President Hassan Rouhani has said that Iran’s response to the pandemic has “been severely hampered by US sanctions” and Foreign Minister Mohammad Javad Zarif told the United Nations last week that the sanctions have curtailed Tehran’s access to medical supplies. The Treasury Department did issue a general license exemption last month allowing for trade in humanitarian goods through Iran’s Central Bank.