"We continue to exert pressure through the OPEC member states, since we ourselves are not a member of the organization, in order to resolve the issue of fuel supplies," RIA Novosti quoted Psaki as saying at a briefing.

So she answered the question of what measures Washington is taking to reduce high fuel prices in the country.

The administration is working on a more balanced distribution of fuel across the country, Psaki said.

Earlier, Russian Deputy Prime Minister Alexander Novak said in an interview with CNBC that Washington had not approached Moscow on the issue of lowering oil prices.