US heating oil futures traded around $4.26 per gallon, holding most of their gains from the previous session as supply concerns intensified amid rising geopolitical risks. US-Iran diplomatic efforts remained stalled after Washington ruled out reviving the terms of a June agreement and said it was not currently negotiating with Tehran. The US has instead intensified pressure through new sanctions earlier this week, which Iran condemned as hostile and ineffective. Meanwhile, Black Sea shipments faced heightened risks as Russia considers intensifying military pressure on Ukraine after determining that peace negotiations have reached a dead end. At the same time, strikes on Russian refineries have disrupted refining capacity, adding to regional fuel supply concerns. In the US, EIA data showed distillate stockpiles fell by a larger-than-expected 2.2 million barrels last week, compared to expectations for a 1.6 million-barrel decline, pointing to tight inventories.