“Effective immediately, any Country doing business with the Islamic Republic of Iran will pay a Tariff of 25% on any and all business being done with the United States of America,” Trump said in a post on Truth Social.

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Tariffs are paid by U.S. importers of goods from those countries. Iran, a member of the OPEC oil producing group, has been heavily sanctioned by Washington for years. It exports much of its oil to China, with Turkey, Iraq, the United Arab Emirates and India among its other top trading partners.

“This Order is final and conclusive,” Trump said without providing any further detail.

There was no official documentation from the White House of the policy on its website, nor information about the legal authority Trump would use to impose the tariffs, or whether they would be aimed at all of Iran’s trading partners. The White House did not respond to a request for comment.

The Chinese embassy in Washington criticized Trump’s approach, saying China will take “all necessary measures” to safeguard its interests and opposed “any illicit unilateral sanctions and long-arm jurisdiction.”

“China’s position against the indiscriminate imposition of tariffs is consistent and clear. Tariff wars and trade wars have no winners, and coercion and pressure cannot solve problems,” a spokesperson of the Chinese embassy in Washington said on X.

Japan and South Korea, which agreed on trade deals with the U.S. last year, said on Tuesday they are closely monitoring the development.

“We … plan to take any necessary measures once the specific actions of the U.S. government become clear,” South Korea’s trade ministry said in a statement.

Japan’s Deputy Chief Cabinet Secretary Masanao Ozaki told reporters that Tokyo will “carefully examine the specific content of any measures as they become clear, as well as their potential impact on Japan, and will respond appropriately.”

Tehran said on Monday it was keeping communication channels with Washington open as Trump considered how to respond to the situation in Iran, which has posed one of the gravest tests of clerical rule in the country since the Islamic Revolution in 1979.

Demonstrations evolved from complaints about dire economic hardships to defiant calls for the fall of the deeply entrenched clerical establishment. U.S.-based rights group HRANA said it had verified the deaths of 599 people – 510 protesters and 89 security personnel – since the protests began on December 28.

While air strikes were one of many alternatives open to Trump, “diplomacy is always the first option for the president,” White House press secretary Karoline Leavitt said on Monday.

During the course of his second term in office, Trump has often threatened and imposed tariffs on other countries over their ties with U.S. adversaries and over trade policies that he has described as unfair to Washington.

Trump’s trade policy is under legal pressure as the U.S. Supreme Court is considering striking down a broad swathe of Trump’s existing tariffs.

Iran exported products to 147 trading partners in 2022, according to World Bank’s most recent data.

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Cuban President Miguel Díaz-Canel declared Monday that his administration is not negotiating with Washington, despite President Donald Trump’s threats to push Cuba into a deal now that Venezuelan oil will no longer be supplied.

“There are no conversations with the U.S. government, except for technical contacts in the migration field,” Díaz-Canel said in a post on X.

Díaz-Canel continued to denounce the U.S., accusing it of applying hostile pressure on the island, and insisted that negotiations would only take place if they are conducted in accordance with international law.

“As history demonstrates, relations between the U.S. and Cuba, in order to advance, must be based on International Law rather than on hostility, threats, and economic coercion,” he said.

TRUMP ADMIN TO CONTROL VENEZUELAN OIL SALES IN RADICAL SHIFT AIMED AT RESTARTING CRUDE FLOW

“We have always been willing to engage in a serious and responsible dialogue with the various governments of the United States, including the current one, on the basis of sovereign equality, mutual respect, principles of International Law, reciprocal benefit without interference in internal affairs and with full respect for our independence,” Canel added. 

On Sunday, Trump declared that Cuba would no longer receive oil or money from Venezuela, a move that would sever Havana’s longtime energy and financial lifeline. 

The announcement came after a stunning Jan. 3 operation in Venezuela, in which American forces captured President Nicolás Maduro and reportedly killed at least 32 Cuban personnel.

VENEZUELAN OIL SHIPMENTS SURGE TO US PORTS WITH HEAVY CRUDE AFTER MADURO CAPTURE

“THERE WILL BE NO MORE OIL OR MONEY GOING TO CUBA – ZERO! I strongly suggest they make a deal, BEFORE IT IS TOO LATE,” he warned.

Cuba has long depended on imported oil to keep its aging power grid running. Before the U.S. attack on Venezuela, Havana was receiving 35,000 barrels a day from Venezuela, roughly 7,500 from Russia and some 5,500 barrels daily from Mexico, The Associated Press reported, citing Jorge Piñón of the Energy Institute at the University of Texas at Austin, who tracks the shipments.

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Even with Venezuelan oil imports, Cuba has suffered widespread blackouts in recent years due to persistent fuel shortages, an aging and crumbling electric grid and damage from hurricanes that have battered the island’s infrastructure.  

Now, with U.S. sanctions tightening on both Russian and Venezuelan oil, blackouts could worsen as Havana’s leaders reject Trump’s call to strike a deal. 

The Associated Press contributed to this report.

The SDF denies the Syrian Ministry of Defence’s accusations that it had deployed military forces to the Deir Hafer front in the eastern Aleppo countryside.

The Syrian army has sent reinforcements to rural eastern Aleppo, after observing the arrival of more Syrian Democratic Forces (SDF) forces in the area, following days of deadly battles inside the city itself and the departure of the SDF.

The official news agency SANA broadcast footage on Monday of Syrian army troops heading towards the deployment line east of Aleppo.

SANA quoted the Syrian Army Operations Authority as saying: “We have observed the arrival of more armed groups to the deployment points of the SDF organisation in the eastern Aleppo countryside near Maskana and Deir Hafer.”

The agency added: “According to our intelligence sources, these new reinforcements included a number of fighters from the Kurdistan Workers’ Party (PKK),” which last year began withdrawing all its forces from Turkiye to northern Iraq as part of a peace process with Turkiye, bringing an end to a months-long disarming process following a four-decade armed conflict that killed tens of thousands of people.

The SDF denied the Syrian Ministry of Defence’s accusations that it had deployed military forces to the Deir Hafer front in the eastern Aleppo countryside.

It said there were no unusual movements or preparations in the area, adding that the gatherings that took place were limited to civilians from northern and eastern Syria to receive the wounded from the Sheikh Maqsoud and Ashrafieh neighbourhoods in the city of Aleppo.

Residents return after battles

Syrian government forces on Monday were carrying out security sweeps in the city of Aleppo.

As some residents displaced by the fighting began returning to their areas, army forces were working to remove explosive devices and weapons in other parts.

Residents of Ashrafieh, the first of the two neighbourhoods to fall to the Syrian army, began returning to their homes to inspect the damage, finding shrapnel and broken glass littering the streets on Sunday.

“Most people are returning to Ashrafieh, and they have begun to rebuild as there has been a lot of destruction,” said Al Jazeera’s Bernard Smith, reporting from Aleppo.

He added that this was not the case for Sheikh Maqsoud, where government forces were still searching for explosives.

Smith added that Syrian forces were also looking for opposition prisoners arrested by the SDF during the rule of former leader Bashar al-Assad, who was overthrown in December 2024 by forces led by the current president, Ahmed al-Sharaa.

United States envoy Tom Barrack met al-Sharaa on Saturday and afterwards issued a call for a “return to dialogue” in accordance with the integration agreement.

The departure of the fighters marks the removal of SDF from pockets of Aleppo, which it has held since Syria’s war began in 2011.

Syrian health authorities said on Sunday at least 24 civilians have been killed and 129 wounded in SDF attacks since last Tuesday.

Munir al-Mohammad, media director at Aleppo’s health directorate, said the casualties were caused by repeated attacks targeting civilian areas, according to SANA.

The United Kingdom-based monitor, the Syrian Observatory for Human Rights, which follows the developments in Syria through a network of sources on the ground, reported that 45 civilians were killed along with 60 soldiers and fighters from both sides.