Oil prices fell on Monday, dragged down by an economic slowdown and worries about the Sino-U.S. trade war, which have led to a cut in the growth outlook for oil demand.
International benchmark Brent crude futures were at US$58.25 a barrel by 0007 GMT, down 28 cents, or 0.5%, from their previous settlement.
U.S. West Texas Intermediate (WTI) futures were at US$54.28 per barrel, down 22 cents, or 0.4%, from their last close.
Both benchmarks fell last week, with Brent losing more than 5per cent and WTI falling about 2per cent.
Oil prices are falling at the start of the trading week due to lower demand forecasts published last week and pessimism about a U.S.-China trade deal, said Alfonso Esparza, senior market analyst at OANDA in Toronto.
The U.S.-China trade dispute rocked global equity markets last week, while a surprise build in U.S. crude stocks added downward pressure to oil prices, which have lost around 20per cent from their 2019 peaks reached in April.
Mounting signs of an economic slowdown and a ratcheting up of the U.S.-China trade war have caused global oil demand to grow at its slowest pace since the financial crisis of 2008, the International Energy Agency (IEA) said on Friday.
The Paris-based agency cut its 2019 and 2020 global oil demand growth forecast to 1.1 million and 1.3 million barrels per day (bpd), respectively.
Elsewhere, Russia's oil production rose to 11.32 million bpd on August 1-8, up from 11.15 million bpd on average in July, according to two industry sources familiar with the energy ministry data.
In July, the Organization of the Petroleum Exporting Countries (OPEC) and its allies including Russia agreed to extend their supply cuts until March 2020 to prop up oil prices.
In a sign of lower production in the United States, the weekly U.S. oil rig count, an early indicator of future output, fell for a sixth week in a row as producers cut spending on new drilling and completions.