WASHINGTON: The United States will add 700 individuals and entities to its Iran blacklist and pressure the global SWIFT banking network to cut off Tehran when expanded sanctions are put in place next week, US officials said Friday.

But eight countries will be able to continue importing Iranian oil at lower levels in order to avoid upsetting global crude markets when the sanctions take effect on Monday, they said.

The US aims to cripple the Iranian economy to pressure Tehran to halt its nuclear activities and what the US says is broad support for "terrorism" in the region, Secretary of State Mike Pompeo said. The re-imposition of sanctions "is aimed at depriving the regime of the revenues it uses to spread death and destruction around the world," Pompeo said.

"Our ultimate aim is to compel Iran to permanently abandon its well-documented outlaw activities and behave as a normal country." The sanctions come six months after President Donald Trump withdrew from the 2015 nuclear deal struck between world powers and Iran.

At the time, he began reimposing sanctions that had been suspended or removed by his predecessor Barack Obama. That process will be completed starting from midnight Sunday, US eastern time, when sanctions on the regime´s banks, shippers, shipbuilders and oil sector are imposed.

The impact remains in question as other countries, particularly Washington´s European allies, resist joining its effort to economically strangle the Tehran regime. The European Union has gone so far as to protect businesses that operate in Iran. It has announced plans for a legal framework through which firms can skirt US sanctions, although few major corporations have been eager to risk the wrath of penalties in the world´s largest economy. "This is not 2012 when the world was united behind sanctions against Iran. This is the Trump administration trying to force the rest of the world to go along with a policy that most countries do not accept," said Barbara Slavin, an Iran expert at the Washington-based Atlantic Council.

"The US has had some success in terms of frightening away major corporations. The sanctions hurt a lot. But Iran is still going to be able to sell oil," especially to China, she said. Pompeo said the US will grant exemptions to eight countries that have pledged to or have already cut back on purchases of petroleum from Iran, which has long depended on crude exports to power its economy. He did not name the eight countries, but they are believed to include India, Japan, South Korea, and possibly China.

Pompeo said the countries agreed that the payments for the oil will go into offshore accounts that Iran will only be able to tap for "humanitarian trade, or bilateral trade in non-sanctioned goods and services." "Maximum pressure means maximum pressure," Pompeo said.