World oil prices have risen yet again on Monday due to the misunderstanding between the West and Iran on its nuclear program.
Iran still appears to ignore a United Nations deadline to stop enriching uranium.
New York main benchmark, US light crude was up 57 cents to $72.45 per barrel by mid-afternoon in Europe.
Meanwhile, London's Brent had gained 58 cents to $72.60 in quiet trading on ICE Futures.
On Sunday Iran's top nuclear negotiator said his country was "allergic to the suspension" of uranium enrichment.
Iran, the second-largest exporter in oil producing nations group Opec, insists its nuclear ambitions are limited to building power stations, but the US fears that Tehran aims to build nuclear weapons.
