• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
PoliticsU.S. Politics

As Iran Threatens Retaliation Against U.S., Trump Plans New Sanctions

By
Nasser Karimi
Nasser Karimi
,
Jon Gambrell
Jon Gambrell
,
The Associated Press
The Associated Press
and
Fortune Editors
Fortune Editors
Down Arrow Button Icon
By
Nasser Karimi
Nasser Karimi
,
Jon Gambrell
Jon Gambrell
,
The Associated Press
The Associated Press
and
Fortune Editors
Fortune Editors
Down Arrow Button Icon
September 18, 2019, 9:36 AM ET

President Donald Trump said Wednesday morning that he plans to “substantially” increase sanctions on Iran.

“I have just instructed the Secretary of the Treasury to substantially increase Sanctions on the country of Iran!” Trump tweeted.

Trump’s tweet comes after the U.S. accused of Iran of carrying out attacks Saturday on an oil field in Saudi Arabia.

I have just instructed the Secretary of the Treasury to substantially increase Sanctions on the country of Iran!

— Donald J. Trump (@realDonaldTrump) September 18, 2019

Meanwhile, Iran had warned the U.S. earlier that it will retaliate “immediately” if Tehran is targeted over a weekend attack on Saudi oil installations, its state-run news agency reported Wednesday, further raising Mideast tensions.

Iran’s president and foreign minister also may not be able to attend next week’s high-level meetings at the United Nations as the U.S. has yet to issue them visas, IRNA reported.

The U.N. meeting had been considered as an opportunity for direct talks between Iranian President Hassan Rouhani and President Donald Trump amid a summer of heightened tensions and attacks in the wake of America’s unilateral withdrawal from Iran’s nuclear deal with world powers a year ago.

However, such talks are increasingly unlikely in the wake of the recent attack in Saudi Arabia, U.S. accusations that Tehran was behind it and hardening comments from Iran. Yemen’s Iranian-backed Houthi rebels have claimed the attack in response to the Saudi-led war in Yemen, which has sparked the world’s worst humanitarian crisis and killed tens of thousands of people.

Iran sent a note through Swiss diplomats in Tehran on Monday, reiterating that Tehran denies being involved in the Saudi attack, IRNA reported. The Swiss have looked after American interests in Tehran for decades.

“If any action takes place against Iran, the action will be faced by Iran’s answer immediately,” IRNA quoted the note as saying. It added that Iran’s response wouldn’t be limited to the source of the threat, suggesting it would inflict damage beyond what it had suffered.

IRNA separately reported Wednesday that Iran’s first delegation for the annual U.N. event had not left Iran due to not having visas. Foreign Minister Mohammad Javad Zarif was to travel to New York on Friday, with Rouhani following Monday, according to the agency.

As the host of the U.N.’s headquarters, the U.S. is mandated to offer world leaders and diplomats visas to attend meetings there. But as tensions have risen, the U.S. has put increasing restrictions on Iranians like Zarif. Since becoming Iran’s president in 2013, Rouhani has spoken each year at the General Assembly.

The U.S. State Department did not respond to requests for comment Wednesday. Trump separately tweeted: “I have just instructed the Secretary of the Treasury to substantially increase Sanctions on the country of Iran!” He did not elaborate, and Treasury officials could not immediately be reached. Trump’s National Security Council said it had no comment beyond the president’s tweet.

U.S. Secretary of State Mike Pompeo is traveling to Saudi Arabia for meetings after Saturday’s attack, which hit a Saudi oil field and the world’s largest crude oil processing plant. The Saudi military planned to speak to journalists Wednesday in Riyadh to discuss their investigation “and present material evidence and Iranian weapons proving the Iranian regime’s involvement.”

“Almost certainly it’s Iranian-backed,” Prince Khalid bin Bandar, Saudi Arabia’s ambassador to the United Kingdom, told the BBC. “We are trying not to react too quickly because the last thing we need is more conflict in the region.”

Meanwhile, the state-run Saudi Press Agency carried a statement Wednesday saying the kingdom had joined a U.S.-led naval coalition to secure the Mideast’s waterways. Australia, Bahrain and the United Kingdom already have joined the mission.

Cmdr. Joshua Frey, a spokesman for the U.S. Navy’s 5th Fleet, declined to comment on the Saudi announcement, saying it “would be inappropriate to comment on the status of individual nations and the nature of any potential support.”

The coalition aims to secure the broader Persian Gulf region. It includes surveillance of the Strait of Hormuz, the narrow mouth of the Persian Gulf through which a fifth of the world’s oil travels, and the Bab el-Mandeb, another narrow strait that connects the Red Sea and the Gulf of Aden off Yemen and East Africa.

The U.S. blames Iran for the apparent limpet mine explosions on four vessels in May and another two in June sailing in the Gulf of Oman near the Strait of Hormuz, something Iran denies being behind. Iran also seized a British-flagged oil tanker and another based in the United Arab Emirates after the British seized a tanker carrying Iranian oil.

In Tehran, Rouhani told his Cabinet that Saudi Arabia should see the weekend attack as a warning to end its war in Yemen, where it has fought the Houthi rebels since 2015 and sought to restore the internationally recognized government.

Rouhani said Yemenis “did not hit hospitals, they did not hit schools or the Sanaa bazaar,” referring to the Saudi-led coalition’s widely criticized airstrikes on civilian targets.

He added that Iran does not want conflict in the region, but it was the Saudi-led coalition that “waged the war in the region and ruined Yemen.” Saying the Houthis were responsible for the drone strikes, he said: “They attacked an industrial center to warn you. Learn the lesson from the warning.”

Iran’s defense minister, Gen. Amir Hatami, also denied his country launched the attack, saying the Houthis had the capability to launch the assault.

Wednesday’s announcements come after Saudi Arabia’s energy minister said late Tuesday that more than half of the country’s daily crude oil production that was knocked out by an attack had been recovered. He said production capacity at the targeted plants would be fully restored by the end of the month, in part by drawing from Saudi reserves of crude oil.

Pompeo was due to land in the Red Sea city of Jiddah, where he was scheduled to meet with Saudi Crown Prince Mohammed bin Salman. Pompeo will later travel to the United Arab Emirates on Thursday to meet with Abu Dhabi’s powerful crown prince, Sheikh Mohammed bin Zayed Al Nahyan. Both nations are U.S. allies and have been fighting against the Houthis in Yemen.

Marine Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, said Tuesday that U.S. military experts were in Saudi Arabia working with their counterparts to “do the forensics on the attack” — gleaning evidence that could help build a convincing case for where the weapons originated.

On Wednesday, French President Emmanuel Macron’s office announced experts from his nation would be traveling to Saudi Arabia to help the kingdom shed light “on the origin and methods” of the attacks. France has been trying to find a diplomatic solution to the tensions between Iran and the U.S., so any conclusion they draw could be used as a third-party assessment of what happened.

More must-read stories from Fortune:

—145 CEOs call on Senate to support ‘common-sense gun laws’
—These are the 2020 senate races to watch
—Black women voters are key to the 2020 presidential race. Here’s who they support
—The U.K. government’s worst case Brexit scenario looks a lot like ‘Mad Max: Fury Road’
—Can Andrew Yang win in 2020? Inside his unorthodox campaign
Get up to speed on your morning commute with Fortune’s CEO Daily newsletter.

About the Authors
By Nasser Karimi
See full bioRight Arrow Button Icon
By Jon Gambrell
See full bioRight Arrow Button Icon
By The Associated Press
See full bioRight Arrow Button Icon
Fortune Editors
By Fortune Editors
See full bioRight Arrow Button Icon

Latest in Politics

Danish military forces participate in an exercise with hundreds of troops from several European NATO members in the Arctic Ocean in Nuuk, Greenland, Monday, Sept. 15, 2025.
PoliticsDonald Trump
Danish intelligence report warns of U.S. economic leverage and military threat under Trump
By The Associated PressDecember 13, 2025
1 hour ago
Ukrainian President Volodymyr Zelensky gives a joint press conference in Kyiv, Ukraine in 2023 as European leaders visit the country 18 months after the start of Russia's invasion.
EuropeUkraine invasion
EU indefinitely freezes Russian assets to prevent Hungary and Slovakia from vetoing billions of euros being sent to support Ukraine
By Lorne Cook and The Associated PressDecember 13, 2025
1 hour ago
Spanish Prime Minister Pedro Sánchez often praises the financial and social benefits that immigrants bring to the country.
EuropeSpain
In a continent cracking down on immigration and berated by Trump’s warnings of ‘civilizational erasure,’ Spain embraces migrants
By Suman Naishadham and The Associated PressDecember 13, 2025
1 hour ago
Politicsdavid sacks
Can there be competency without conflict in Washington?
By Alyson ShontellDecember 13, 2025
6 hours ago
PoliticsAffordable Care Act (ACA)
With just days to go before ACA subsidies expire, Congress is about to wrap up its work with no consensus solution in sight
By Kevin Freking, Lisa Mascaro and The Associated PressDecember 13, 2025
7 hours ago
PoliticsDonald Trump
Trump couldn’t insult his way to victory in Indiana redistricting battle. ‘Folks in our state don’t react well to being bullied’
By Thomas Beaumont, Isabella Volmert and The Associated PressDecember 13, 2025
8 hours ago

Most Popular

placeholder alt text
Economy
Tariffs are taxes and they were used to finance the federal government until the 1913 income tax. A top economist breaks it down
By Kent JonesDecember 12, 2025
2 days ago
placeholder alt text
Success
Apple cofounder Ronald Wayne sold his 10% stake for $800 in 1976—today it’d be worth up to $400 billion
By Preston ForeDecember 12, 2025
1 day ago
placeholder alt text
Success
40% of Stanford undergrads receive disability accommodations—but it’s become a college-wide phenomenon as Gen Z try to succeed in the current climate
By Preston ForeDecember 12, 2025
1 day ago
placeholder alt text
Economy
The Fed just ‘Trump-proofed’ itself with a unanimous move to preempt a potential leadership shake-up
By Jason MaDecember 12, 2025
1 day ago
placeholder alt text
Economy
For the first time since Trump’s tariff rollout, import tax revenue has fallen, threatening his lofty plans to slash the $38 trillion national debt
By Sasha RogelbergDecember 12, 2025
1 day ago
placeholder alt text
Success
Apple CEO Tim Cook out-earns the average American’s salary in just 7 hours—to put that into context, he could buy a new $439,000 home in just 2 days
By Emma BurleighDecember 12, 2025
1 day ago
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.