Dhaka, July 3 -- Oil prices eased on Thursday, reversing gains from the previous session, on concerns over weak U.S. demand after government data showed a surprise build in inventories in the world's biggest crude consumer.

Brent crude futures fell 24 cents, or 0.35 per cent, to $68.87 a barrel by 0044 GMT after gaining 3.0 per cent on Wednesday. US West Texas Intermediate crude fell 24 cents, or 0.36 per cent, to $67.21 a barrel after climbing 3.1 per cent previously.

The US Energy Information Administration said on Wednesday domestic crude inventories rose by 3.8 million barrels to 419 million barrels last week. Analysts in a Reuters poll had expected a drawdown of 1.8 million barrels, according to Reuters.

Gasoline demand dropped to...