The International Court of Justice has begun hearing a lawsuit brought by Iran against new US sanctions ordered by the Trump administration.
Iran last month lodged a complaint with the Hague-based tribunal, arguing that the sanctions violate the terms of a 1955 friendship treaty between the two countries.
The country opened a lawsuit Monday demanding the UN's top court order the suspension of the renewed US sanctions.
"The United States is publicly propagating a policy intended to damage as severely as possible Iran's economy and Iranian nationals and companies," Iran's lawyer Mohsen Mohebi told the court.
"This policy is nothing but naked economic aggression against my country," he said, adding "Iran will put up the strongest resistance to the US economic strangulation, by all peaceful means."
Tehran has called on the United Nations court to order the immediate lifting of the sanctions, and demanded compensation for damages incurred in their wake.
Sanctions had been lifted under a 2015 nuclear agreement between Iran and six other countries - the US, Germany, France, Britain, China and Russia.
President Donald Trump unilaterally pulled the US out of the deal with Iran in May and pledged to reimpose the most restrictive sanctions on the country.
Washington reinstated the first batch of sanctions in early August and will re-impose the second batch in November which will primarily be meant to undermine Tehran’s oil exports.
The United States’ lawyers will present their arguments on Tuesday. They are expected to argue that the ICJ should not have jurisdiction in the dispute.
The oral arguments, essentially a request by Iran for a provisional ruling, will last for four days, with a decision to follow within a month.
The ICJ was set up in 1946 to resolve international disputes. Its rulings are binding but on rare occasions they have been ignored by certain countries, chiefly the United States.