SINGAPORENEW DELHI Jan 29 Reuters Oil prices climbed on Monday after a drone attack on U.S. forces in Jordan added to worries over supply disruption in the Middle East as Houthi rebels stepped up their attacks on vessels in the Red Sea, hitting a Trafiguraoperated fuel tanker.

Risks of a widening conflict in the Middle East come at the same time that Russian refined product exports are set to fall, with refineries and a major oil terminal under repair following drone attacks by Ukraine.

Brent crude futures rose 26 cents, or 0.3, to 83.81 a barrel by 0740 GMT after hitting a sessionhigh of 84.80. U.S. West Texas Intermediate crude futures gained 23 cents, or 0.3, to 78.24 a barrel after reaching an intraday high of 79.29 earlier in the session.

The attack on U.S. troops in a drone strike in Jordan raised concerns of a wider conflict in the oilrich Middle East.

We believe the death of three U.S. service members today in Jordan marks a critical inflection point in the ongoing conflict in the Middle East and raises a specter of a more substantial U.S. involvement in the war, RBC Capital analyst Helima Croft said in a note, adding that a more direct confrontation with Iran heightened the prospect of regional energy supply disruptions.

Commodities trader Trafigura said on Saturday it was assessing the security risks of further Red Sea voyages after firefighters put out a blaze on a tanker attacked by Yemen39;s Houthi group a day earlier.

Disruptions to supply have been…