Oil rose more than 3% towards $64 a barrel today after Iran shot down a US military drone, raising fears of a military confrontation between Tehran and Washington.
Expectations that the US Federal Reserve could cut interest rates at its next meeting, stimulating growth in the world's largest oil-consuming country, and a drop in US crude inventories also supported prices.
Brent crude, the global benchmark, was up $2.06 at $63.88 a barrel this afternoon, having earlier gained 3.4% to $63.93.
US West Texas Intermediate crude rose $2.33 to $56.09.
The drone was downed in international airspace over the Strait of Hormuz by an Iranian surface-to-air missile, a US official said.
Iran's Revolutionary Guards said the drone was flying over southern Iran.
Tension has been rising in the Middle East, home to over 20% of the world's oil output, after attacks on two tankers near the Strait of Hormuz, a chokepoint for oil supplies.
Washington blamed Tehran for the tanker attacks. Iran denied any role.
Concern about slowing economic growth and a US-China trade dispute has pulled oil lower in recent weeks. Brent reached a 2019 high of $75 in April.
Also propelling oil higher today was a decline in US crude inventories and the prospect of prolonged supply restraint by producer group OPEC and its allies.
US crude stocks fell by 3.1 million barrels last week, more than analysts expected, the Energy Information Administration said yesterday.
Meanwhile, the Organization of the Petroleum Exporting Countries and allies including Russia agreed this week to meet on July 1-2, ending a month of wrangling about the timing.
The coalition known as OPEC+ looks set to extend a deal on cutting 1.2 million barrels per day of production. The deal expires at the end of June.