“China demand concerns because of the renewed restrictions from the viral spread were what caused the earlier weakness,” said Phil Flynn, senior market analyst at Price Futures Group.

Meanwhile, in the U.S., crude stockpiles fell 879,000 barrels last week and gasoline supplies dropped by 5.75 million barrels, according to people familiar with the industry-funded American Petroleum Institute’s inventory data on Tuesday. Crude rallied strongly in the first half of the year as the roll out of vaccines allowed major economies to reopen, boosting oil demand and draining the glut built up during initial waves of the pandemic. However, the fast-spreading delta variant has led to renewed restrictions in many countries. “Asia-Pacific is currently the focal point of lock downs,” said Pavel Molchanov, an analyst at Raymond James & Associates Inc. “There are 887 million people worldwide are currently in lock down, which is more than at the beginning of 2021, and 85% of them are in Asia-Pacific.”

Crude’s decline also put the U.S. benchmark under technical pressure. WTI fell below its 50-day moving average and is edging closer to its 100-day moving average. Such moves can often spark additional selling from trend-following funds.

The API also reported U.S. distillate inventories fell 717,000 barrels last week and supplies at the Cushing, Oklahoma, storage hub rose by 659,000 barrels. The U.S. government will report its stockpile data on Wednesday.