SINGAPORE: Oil prices fell further on Tuesday after settling down more ​than 2 percent in the previous session, with investors brushing off the impact of the latest US sanctions ‌against Iran.

Brent crude futures fell 90 cents, or 1 percent, to $91.27 a barrel by 09:30 a.m. Saudi time, while US West Texas Intermediate crude was down 76 cents, or 0.9 percent, at $84.25.

Both contracts settled lower on Monday, with US crude oil falling to a one-week low on profit taking after prices ​rallied over the previous two weeks.

“The market seems largely unfazed by Washington’s push for tighter economic pressure on ​Iran, with traders treating the US effort to nudge partners away from Iranian trade as marginal ⁠rather than market moving,” said ING commodity strategists in a note on Tuesday.

US Treasury Secretary Scott Bessent on Monday unveiled ​an expansion of sanctions to cut off Iran's economic lifeline, to force an end to the war between them, telling countries ​they would need to sever their business ties or risk being cut out of the dollar-based financial system.