The United States is expected to announce a total ban on the import of Iranian. All countries that continue to import Iranian oil will be subject to US sanctions, Reuters reported quoting a source familiar with the situation.

Benchmark Brent crude oil futures rose by as much as 3.2 percent to $74.31 a barrel, the highest since Nov. 1, in early trading on Monday in reaction to expectations of tightening supply. U.S. West Texas Intermediate (WTI) futures climbed as much as 3 percent to $65.87 a barrel, its highest since Oct. 30.

U.S. President Donald Trump wants to end the waivers to exert “maximum economic pressure” on Iran by cutting off its oil exports and reducing its main revenue source to zero.

In November, the U.S. reimposed sanctions on exports of Iranian oil after President Trump unilaterally pulled out of a 2015 nuclear accord between Iran and six world powers.

Washington, however, granted waivers to Iran’s eight main buyers - China, India, Japan, South Korea, Taiwan, Turkey, Italy and Greece - that allowed them limited purchases for six months.