Oil prices rose on Thursday after a bigger-than-expected decline in U.S. crude inventories, although concerns that the U.S.-China trade war will trigger an economic downturn kept a lid on gains.

Brent crude futures, the international benchmark for oil prices, were at $69.71 per barrel at 0502 GMT, up 26 cents, or 0.4% from their last close. Brent fell nearly 1% in the previous session, Reuters said.

U.S. West Texas Intermediate (WTI) crude futures were up 40 cents, or 0.7%, at $59.21 a barrel.

Read alsoReuters: Oil drops as trade war concerns outweigh supply disruptions

U.S. crude inventories fell by 5.3 million barrels in the week to May 24 to 474.4 million barrels, data from industry group, the American Petroleum Institute, showed on Wednesday.

Official data from the Energy Information Administration (EIA) is due on Thursday at 1500 GMT.

Outside the United States, oil prices remain supported by output cuts from the Organization of the Petroleum Exporting Countries (OPEC) and other major producers as well as falling supplies from Iran.

Iranian May crude exports fell to less than half of April levels at around 400,000 barrels per day (bpd), tanker data showed and two industry sources said, after the United States tightened sanctions on Tehran's main source of income.

Many analysts expect the supply cuts to be extended in a meeting next month as OPEC's de-facto leader Saudi Arabia wants to prevent oil prices falling back to levels seen in late 2018 when Brent slumped to $50 per barrel.

Since OPEC and its allies started withholding supply in January, oil prices have risen by about 30 percent.