Oil edges higher on U.S. inventory decline

Oil prices edged higher on Wednesday, extending gains as rising tensions with Iran fueled concerns about supply disruptions and as U.S. inventory data showed a much bigger than expected drop in crude stockpiles.

Brent crude futures were up 20 cents, or 0.3 percent, at $64.03 a barrel by 0300 GMT, after rising nearly 1 percent on Tuesday.

U.S. West Texas Intermediate crude were up 23 cents, or 0.4 percent, at $57.00 a barrel, having risen about 1 percent in the previous session.

U.S. crude stocks fell more than expected in the week to July 19, declining by 11 million barrels to 449 million, the trade group American Petroleum Institute said on Tuesday.

That compared with analysts' expectations of a decrease of 4 million barrels.

Crude stocks at the Cushing, Oklahoma, delivery hub fell by 448,000 barrels, although gasoline stocks rose by 4.4 million barrels, compared with analysts' expectations in a Reuters poll for a 730,000-barrel decline.

The U.S. government's official figures are due Wednesday morning.

The potential for renewed Sino-U.S. trade talks also helped bolster prices, analysts said.

White House economic adviser Larry Kudlow on Tuesday called it a good sign that top U.S. officials would be travelling to China to discuss reviving stalled trade talks.

"The possible nearing of a trade deal provided a strong bid for risky assets, lifting oil to its third consecutive gain," Edward Moya, senior market analyst at OANDA in New York, said in a note.

Meanwhile, signs of rising tensions in the Middle East offset a weaker global growth outlook from the International Monetary Fund, which had kept prices largely flat for much of Tuesday's session.

A U.S. Navy ship took defensive action against a second Iranian drone in the Strait of Hormuz last week, but did not see the drone go into the water, the U.S. military said on Tuesday.

"We are confident we brought down one drone, we may have brought down a second," General Kenneth McKenzie told CBS News in an interview.