Oil extended its gains after an industry report was said to find an unexpected drop in U.S. inventories last week, bolstering the picture of a tightening crude market.
Futures in New York gained as much as 1.5 percent in after-hours trading on Tuesday, after the American Petroleum Institute reportedly showed a 3.1 million barrel decline in American stockpiles. If confirmed by official government data due on Wednesday, that would defy analyst forecasts of rising supplies.
