The U.S. announced in August that it had confiscated 1.1 million barrels of Iranian fuel bound for Venezuela, part of Washington's efforts to disrupt trade between Caracas and Tehran.
Chancellor Angela Merkel is under mounting pressure from members of her conservative party to suspend the Nord Stream 2 pipeline, a huge project to double Russian gas exports to Germany.
The State Department also imposed sanctions on five companies for engaging in transactions related to Iran’s petroleum and petrochemical industry, as well as on three executive officers of the blacklisted companies.
OPEC oil output has risen by about 1 million bbl/d in August, a Reuters survey found, as the group and allies eased record oil supply curbs.
Exemptions for European and Asian companies for diesel would be removed.
Crude exports from Saudi Arabia, the world's largest oil exporter, extended a decline in June to the lowest on record as global demand remained squeezed by the COVID-19 pandemic.
In August, OPEC+ eased its oil pruduction cuts to 7.7 million bbl/d from 9.7 million bbl/d previously, a record cutback, as demand partially recovered.