
Brent crude futures rose 1.75% to $111.47 a barrel by 09:30 GMT on Tuesday, according to the supplied report.
US West Texas Intermediate futures also climbed, with the November contract due to expire on Tuesday.
Analysts say geopolitical uncertainty and reports of attacks on vessels are sustaining a risk premium in oil prices.
Potential additional Russian energy supplies could ease pressure, but traders remain focused on risks to Middle East energy infrastructure.
Oil prices rose on Tuesday, with Brent crude trading near a five-month high as renewed concerns over Middle East security and potential energy supply disruptions outweighed the prospect of additional Russian fuel supplies.
According to the figures in the supplied report, Brent crude futures rose by $1.92, or 1.75%, to $111.47 a barrel by 09:30 GMT on Tuesday. The benchmark had reached $110.70 in the previous session, its highest level since May 20.
US West Texas Intermediate crude futures for November delivery, which expire on Tuesday, gained $4.30, or 4.15%, to $107.96 a barrel. The more actively traded December contract rose by $1.76, or 1.79%, to $100.30.
These figures reflect the trading snapshot cited in the supplied report; oil prices can change substantially during the session.
ING analysts said in a note on Tuesday that oil prices remained strongly supported by a significant risk premium amid regional volatility.
They added that the premium could gradually decline if physical oil flows continued without disruption, but said there were no clear signs of that happening yet.
Ship-tracking firm Kpler said in a note on Monday that at least 18 vessels had reportedly been attacked over the preceding two weeks.
The reports have reinforced market concerns over maritime security and the possibility of further disruptions to energy transportation.
US President Donald Trump issued an executive order suspending or waiving some Russia-related sanctions and tariffs, potentially opening the way for additional Russian energy supplies.
However, Trump said on Saturday that no final decision had been announced, while Secretary of State Marco Rubio said officials needed more time to assess the situation.
The International Energy Agency reported that Russian crude production rose by 65,000 barrels per day in September to 8.43 million barrels per day. Production nevertheless remained about 870,000 barrels per day below its level a year earlier.
Oil prices advanced on Tuesday as traders weighed the risk of further disruption to Middle East energy supplies against the possibility of increased Russian fuel exports.
Brent crude futures rose to $111.47 a barrel by 09:30 GMT, up 1.75%, according to the supplied report. The benchmark had reached $110.70 in the previous session, its highest level since May 20.
US West Texas Intermediate futures for November delivery climbed 4.15% to $107.96 a barrel. That contract was set to expire on Tuesday, while the more actively traded December contract rose 1.79% to $100.30.
The increase comes amid continuing uncertainty over regional security and energy transportation. ING analysts said the market was pricing in a substantial geopolitical risk premium because of the volatility. They cautioned that the premium could gradually diminish if oil shipments continued without interruption, although they saw no clear indication of that yet.
Kpler reported that at least 18 vessels had reportedly been attacked over the previous two weeks, keeping concerns about maritime security elevated.
Meanwhile, an initial Reuters poll on Monday indicated that US crude inventories, along with stocks of refined petroleum products, were expected to have declined in the previous week. The figures were estimates ahead of official inventory data.
Developments involving Russian energy supplies have added another factor for traders. Trump signed an executive order suspending or waiving some Russia-related sanctions and tariffs, potentially easing restrictions on energy trade. But uncertainty remains over the scope and implementation of the measures, and officials have indicated that further assessment is needed.
The International Energy Agency said Russian crude output increased to 8.43 million barrels per day in September, although it remained substantially below the level recorded a year earlier.
Tim Waterer, chief market analyst at KCM Trade, said the prospect of additional Russian diesel supplies offered some theoretical relief, but traders appeared more concerned about the continuing risk of damage to energy infrastructure across the Gulf region.
The price rise illustrates how oil markets can respond not only to confirmed production losses but also to the risk that shipping routes, ports or energy facilities could be disrupted. When traders anticipate possible supply interruptions, they may pay a higher price for crude futures before any sustained shortage is established. Reuters has similarly reported that attacks on Saudi infrastructure and reports of vessel attacks have helped keep Brent near a five-month high.
The outlook also reflects competing supply signals. A relaxation of some Russia-related restrictions could potentially increase the availability of Russian energy products, but the effect depends on the measures’ scope, implementation and the capacity to deliver additional supplies. The IEA’s September production figures show that Russian crude output had risen month on month but remained below its level a year earlier.
For oil-importing economies, sustained prices above $100 a barrel can raise fuel-import bills and add pressure to transport, production and consumer costs. The immediate direction of prices will depend on whether regional risks translate into actual supply disruptions, alongside inventory data and changes in Russian energy flows.
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