Brent crude oil prices hit their highest level since November 2014 on Monday ahead of U.S. sanctions against Iran that kick in next month.
Brent sweet crude oil futures rose to as much as 83.27 dollars a barrel.
U.S. West Texas Intermediate (WTI) crude futures were at 73.57 dollars a barrel.
Brent was pushed up by the looming sanctions against Iran, which will start targeting its oil sector from Nov. 4.
ANZ bank said on Monday that โthe market is eyeing oil prices at 100 dollars per barrelโโ.
There had been expectations China would ignore U.S. sanctions.
However, Chinaโs Sinopec is halving loadings of crude oil from Iran this month, in a sign that pressure from Washington is having an effect.
U.S. President Donald Trump called Saudi Arabiaโs King Salman on Saturday, discussing ways to maintain sufficient supply once Iranโs exports are hit by sanctions.
With oil prices soaring, there are concerns over their inflationary effect on demand growth, especially in Asiaโs emerging markets where weakening currencies are further adding to high fuel import costs.
In Japan, business confidence among big manufacturers worsened in the last quarter to hit its lowest level in nearly a year, as firms felt the pinch from rising raw material costs.
Global trade conditions seemed worsened.
