Russia said it would continue to find buyers for its oil, despite what it said was a "dangerous" attempt by Western governments to introduce a price cap on its oil exports.
A coalition of Western countries led by the G7 group of nations agreed on Friday to cap the price of Russian seaborne oil at $60 a barrel, as they aim to curb its ability to finance its conflict in Ukraine.
Russian President Vladimir Putin and high-ranking Kremlin officials have repeatedly said that they will not supply oil to countries that implement the price cap.
In comments published on Telegram, Russia's embassy in the United States criticised what it said was the "reshaping" of free market principles and reiterated that its oil would continue to be in demand despite the measures.
"Steps like these will inevitably result in increasing uncertainty and imposing higher costs for raw materials' consumers," it said.
"Regardless of the current flirtations with the dangerous and illegitimate instrument, we are confident that Russian oil will continue to be in demand."
The G7 price cap will allow non-EU countries to continue importing seaborne Russian crude oil, but it will prohibit shipping, insurance and re-insurance companies from handling cargoes of Russian crude around the globe, unless it is sold for less than the price cap.
An Israeli air strike has killed at least three people in the Gaza Strip on Monday, local health officials said, in the latest round of violence since a US-brokered ceasefire took effect more than five months ago.
Spain has closed its airspace to US planes involved in attacks on Iran, a step beyond its previous denial of use of jointly-operated military bases, Spanish newspaper El Pais reported on Monday, citing military sources.
A United Nations peacekeeper has been killed in southern Lebanon overnight, prompting condemnations on Monday after a weekend in which Lebanese journalists and medics were killed in Israeli strikes.
Kuwait's Ministry of Electricity, Water, and Renewable Energy has announced on Sunday that an Iranian attack has killed one worker and damaged a service building at one of its power and water distillation plants.
Iran said it was ready to respond to a US ground attack, accusing Washington on Sunday of preparing a land assault even as the Trump administration sought talks and as regional powers met in Pakistan to try to end the conflict.