The United States is expected to announce on Monday, April 22 that buyers of Iranian oil need to end imports soon or face sanctions, a source familiar with the situation told Reuters, triggering a 3 percent jump in crude prices to their highest for 2019 so far.

Officials in Asia opposed the expected move, pointing to tight market conditions and high fuel prices that were harming industry.

The source confirmed a report by the Washington Post that the administration will terminate the sanctions waivers it granted to some importers of Iranian oil late last year.

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.