"The actions and policies of the Government of Iran continue to pose an unusual and extraordinary threat to the national security, foreign policy, and economy of the United States", Trump said. "I am continuing for one year the national emergency with respect to Iran declared in Executive Order 12957".
The emergency declaration authorises sanctions issued originally under the Clinton administration, which ban US persons or entities from engaging in business related to the development of petroleum resources located in Iran. Then-President Bill Clinton told Congress the measures were being implemented due to Iran’s alleged involvement with international terrorism and WMD development.
Earlier, Tehran called on Washington to lift sanctions because they are hindering Iran's response to the coronavirus outbreak.
Last year, Iran started to reduce its obligations under the 2015 nuclear deal, which was signed to ensure the peaceful nature of Tehran’s nuclear program, in response to US President Donald Trump’s decision to withdraw the United States from the agreement.