Oil markets jumped on Monday on concerns over potential renewed U.S. sanctions against Iran as well as conflict in Iraq, while an explosion at a U.S. oil rig and reduced exploration activity supported prices there.
International Brent crude futures were at $57.82 at 0645 GMT, up 65 cents, or 1.1 %, from the previous close.
Prices were being pushed up by worries over renewed U.S. sanctions against Iran.
U.S. President Donald Trump last Friday refused to certify that Tehran is complying with the accord even though international inspectors say it is.
U.S. crude prices were further supported by drillers cutting back the number of rigs looking for new production.
WTI crude futures were at $51.89 per barrel, up 44 cents, or 0.9%, CNBC reported.
