Crude oil futures held steady near multi-week highs in after-hours trading on Thursday as heightened tensions in the Middle East raised concerns about further disruption to crude supplies through the Strait of Hormuz.
Front-month West Texas Intermediate futures were up 0.43% to $91.52 per barrel, while Brent futures eased 0.04% to $95.66/bbl.
Gelber & Associates strategists said that a larger-than-expected decline in US crude inventories lent support, with strong refinery runs and exports keeping domestic stocks below their typical seasonal range.
US commercial crude oil inventories decreased by 4.5 million barrels to 424.5 mmbbls in the week ended Aug. 28, the Energy Information Administration said in its weekly report released Wednesday.
Crude inventories were about 1% above the five-year average for this time of year, the EIA said. The draw is significantly above Investing.com's estimate of 400,000 barrels for the week ended Aug 28.
Hostilities in the Middle East remain elevated on Thursday as Iran's military targeted US bases in Kuwait and the UAE. The Kuwaiti Army confirmed that it responded to missile and drone threats, but the UAE hasn't announced any incidents.
President Trump said on Wednesday that he does not expect the current round of hostilities to escalate into a return to war, while noting that the US was "prepared to do another one."
Soojin Kim, research analyst at MUFG, said that neither the US nor Iran has shown willingness to restart negotiations, and the US is extending regional troop deployment, leaving the risk of prolonged disruption elevated.
Meanwhile, Israel has reportedly indicated that it was prepared to return to the fighting if necessary, fueling concerns that the ongoing conflict could widen.
Defense Minister Israel Katz said that an Iranian attack on the Jewish state would free Israel from any existing restrictions in a response against the regime in Tehran, according to media reports.
On the supply front, Energy Secretary Chris Wright reportedly said on Wednesday that a record 17 million barrels of oil transited the Hormuz on Monday under US military protection.
Kim said that despite persistent security risks, the US military reportedly escorted 40 vessels carrying 18 mb of oil through the Strait of Hormuz on Tuesday.
Though crude prices have been restrained by the barrels that are flowing out of the strait, fuel supplies have been tighter, with Ukrainian strikes on Russian refineries reportedly compounding the squeeze.
RBC Capital Markets strategists said that the growing use of dark transits underscores how security concerns are reshaping energy flows via Hormuz, even as shipping activity continues.