REUTERS

Brent crude futures fell 89 cents, or 2.3%, to $37.84 a barrel by 0302 GMT, while U.S. West Texas Intermediate crude futures were down $1.18, or 3.3%, to $35.08 a barrel, as reported by Reuters.

A cluster of infections in Beijing has increased concern of a resurgence of the disease. The coronavirus pandemic started at the end of last year in the Chinese city of Wuhan.

Read alsoReuters: Oil prices extend gains on OPEC+ cuts, record China imports

The oil benchmarks fell about 8% last week, their first weekly declines since April, as U.S. coronavirus cases started increasing. Over the weekend, more than 25,000 new U.S. cases were reported on Saturday alone as more states reported record new infections and hospitalizations.

Industrial output in China, the world's biggest crude oil importer, rose for a second consecutive month in May but the rise was smaller than expected, suggesting the world's second-biggest economy is struggling to get back on track after containing the coronavirus.

The country's refineries increased their throughput in May by 8.2% more than the same period a year ago to about 13.6 million barrels per day (bpd), government data showed.

An OPEC-led monitoring panel will meet on Thursday to discuss ongoing record production cuts and see whether countries have delivered their share of the reductions, but will not make any decision, according to five OPEC+ sources.