Oil prices fell on Friday after dropping about 3% a day earlier as coronavirus cases remained high in major oil consumer India and as a key fuel pipeline in the United States resumed operations after being shut due to a cyber attack.
Brent crude oil futures were down 35 cents, or 0.5%, at $66.70 a barrel by 0200 GMT, while West Texas Intermediate (WTI) was down 28 cents, or 0.4%, at $63.54 a barrel.
"The commodity supercycle rally just hit a hard stop and the energy market doesn't know what to make of Wall Street's fixation over inflation and the slow flattening of the curve in India," said Edward Moya, senior market analyst at OANDA. India is the world's third-biggest oil consumer.
"The crude demand story is still upbeat for the second half of the year and that should prevent any significant dips in oil prices," he added.
Prices came under pressure as a broader surge in commodity prices, labour shortage and much stronger-than-expected US consumer prices data this week stoked inflation concerns that could force the Federal Reserve to raise interest rates.
Raising rates typically boosts the US dollar, which in turn pressures oil prices because it makes crude more expensive for holders of other currencies.
India recorded more than 4,000 Covid-19 deaths for a third straight day on Friday as infections stayed below 400,000, with experts unsure when numbers will peak.
In the United States, President Joe Biden reassured motorists that fuel supplies should start returning to normal this weekend, even as more filling stations ran out of gasoline across the Southeast nearly a week after a cyberattack on the nation's top fuel pipeline.
Colonial Pipeline said late on Thursday it had restarted its entire pipeline system and had begun deliveries in all of its markets.
Traders were also watching the situation in the Middle East after Israel fired artillery and mounted more airstrikes on Friday against Palestinian militants in the Gaza Strip amid constant rocket fire deep into Israel's commercial centre.