In what it termed a "wide-reaching blow" to U.S. intelligence, IRNA said Tehran had carried out the operation in cooperation with "foreign allies", without naming any state.
Trump said he agrees with the US intelligence community's assessment that Iran was behind the attacks, saying, "I don't think too many people don't believe it". That has forced countries around the world to boycott Iranian oil or face sanctions of their own.
"But we can't do that without making sure we have the capability to respond if Iran makes a bad decision" and opts to "go after an American, or an American interest, or to continue to proliferate its nuclear weapons program", said Pompeo.
"We understand that relevant parties may have different concerns but first of all the comprehensive nuclear deal should be properly implemented", he added.
"This is one way for the Iranians to showcase that, if they're going to be paying the costs of sanctions and political isolation, that they can actually begin to impose similar costs on the United States", she said.
Iran is locked in a tense standoff with the United States after Washington withdrew a year ago from the 2015 nuclear deal and reimposed sweeping sanctions, even as its allies said Tehran had abided by the agreement's terms.
Speaking to reporters that afternoon, Secretary of State Mike Pompeo said the United States had intelligence to prove that the attack was carried out by Iran.
The Americans take advantage of the cyber-space to act against Iran and also to contact their spies across the world through safe communication systems, the official said, s noting that the Iranian forces managed to penetrate into the USA cyberespionage systems, which operate under the guise of social, health or athletic websites.
The U.S. Navy sent the USS Bainbridge in response to calls for help from the Front Altair, which was carrying flammable naptha, and the Kokuka Courageous. USA Today has reported the Federal Bureau of Investigation had been examining a 9-year-old domestic dispute involving Shanahan and his then-wife.More news: Lakers Rumors: Kyrie Irving wants to play with Anthony Davis
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He travelled to the base after the Pentagon announced the deployment of an additional 1,000 United States troops to the region.
Heightened Iran-U.S. tensions have stoked fears of increased violence in countries where Iran and its Gulf Arab regional rivals are locked in a sometimes bloody struggle for influence.
"They (these actions) can not be assessed as anything but a conscious course to provoke war", he said.
"If you look at the rhetoric now compared to the days when they were signing that agreement, where it was always 'death to America, death to America, we will destroy America, we will kill America, ' I'm not hearing that too much anymore, and I don't expect to", Trump said in the interview with Time.
Iran's President Hassan Rouhani said on Tuesday that Iranians "will overcome the challenge created by the enemies", according to the Islamic Republic News Agency (IRNA). "Despite all of the Americans' efforts in the region and their desire to cut off our ties with all of the world and their desire to keep Iran secluded, they have been unsuccessful". "They made a tactical and operational level choice", he said, likely involving Quds Force commander Qasem Soleimani. "The question will be to what extent the global community will be behind it", Selva said, according to a Voice of America account of his remarks. He said Iran's ballistic missile technology had changed the balance of power in the Middle East.
State Department spokeswoman Morgan Ortagus called the Iranian announcement "extortion" and accused the Iranian leadership of mounting a "challenge to worldwide norms".
Yemen's Houthi movement launched fresh drone attacks targeting Jizan and Abha airports in southern Saudi Arabia, the group's Al-Masirah TV said on Saturday, adding the installations were out of service, Reuters reports.
Iran's foreign ministry on Monday criticized the Saudi leader's "militaristic, crisis-based approach" and "wrong policies" which it said were responsible for escalating tensions in the region. Immediately after the alleged attack, UN Secretary-General Antonio Guterres said, "Facts must be established and responsibilities clarified".