"We talked about minimizing market disruptions and helping partners find alternatives to Iranian supply of oil", the senior U.S. State Department official said.
Speaking to Press TV, author and political scientist Kaveh Afrasiabi, however, played down Pompeo's drive, saying his efforts will likely fail to produce any result.
"The one that we are most focused on today is ... that we deny Iran the financial capacity to continue this bad behavior", Mr. Pompeo said.
While the USA wants all countries, India included, to reduce oil imports from Iran to zero, Washington's ambassador to the UN Nikki Haley had said a fortnight ago that the Americans were open to working with New Delhi on Chabahar in view of its strategic importance, particularly with regard to Afghanistan. "Recent purchases of USA crude and liquefied natural gas are just a couple of examples of this potential" Haley had said on her visit to India for a meeting with PM Modi on the same.
That push has driven up oil prices amid concerns that a divestment from Iranian oil would reduce the world's overall supply.
Disappointed at India for not making promised investments in Iran's Chabahar port, Iran on Tuesday warned India of ending "special privileges".
In May, President Donald Trump announced that the USA was withdrawing from the Iran nuclear deal signed by the Obama administration in 2015, under which Tehran had agreed to limit its sensitive nuclear activities and allow global inspectors in return for lifting of crippling economic sanctions.
The country supplied 18.4 million tonnes of crude oil between April 2017 and January 2018, but latest figures showed India's oil imports had declined by 15.9% in June, the first month after the United States said it would reimpose sanctions, Reuters reported citing data from shipping and industry sources. Imports from other Middle East suppliers also increased.
HPCL-Mittal Energy Ltd continued to skip Iran oil imports for a second month in June, the data showed.
Two more VLCCs - the Ghinah and the Eagle Victoria - were scheduled to leave the Texas coast for undisclosed ports in India this month, bringing planned United States oil exports to India to at least 191,000 bpd for the month.
June's 228,000 bpd of US exports to India are more than double the previous export record of 98,000 bpd last September, according to US Energy Information Administration data. A trader familiar with the Chinese company's purchases confirmed PetroChina is supplying USA crude to India. Reliance is blending lighter U.S. oil with heavier crudes from other nations, said a trader familiar with plant operations and trade flows.