President Donald Trump said the U.S.is "locked and loaded depending on verification" that Iran staged the attack on major Saudi Arabian oil facilities.
Trump in a tweet said his administration had "reason to believe that we know the culprit" and hinted that the United States was prepared to act upon "verification" of its suspicions.
Houthi rebels in Yemen, where a civil war has raged since they partially unseated the Saudi-backed government, claimed responsibility for the damage at the Aramco oil facilities.
An official statement issued by Aramco noted that the drone attacks has suspended the production of 5.7 million barrels of crude which represents over half of Saudi Arabia's oil output. Most output goes to Asia.
USA pump prices are likely to rise in coming days as gasoline futures spiked by more than 10% on Sunday trading, analysts said.
Analysts fear the attacks - which heightened tensions in the region after the United States blamed Iran - could push the price of crude oil up by $10 a barrel, which would translate as 3p to 4p per litre at the pumps.
Work is under way to restore production at the Abquaiq plant.
Riyadh said it will compensate for the damage at its facilities by drawing on its stocks, which stood at 188 million barrels in June, according to official data.
Oil ended almost 15% higher on Monday, with Brent logging its biggest jump in over 30 years amid record trading volumes, after an attack on Saudi Arabian crude facilities cut the kingdom's production in half and fanned fears of retaliation in the Middle East.
In August, the U.S. Energy Information Administration estimated that Saudi Arabia produced some 9.85 million barrels per day.
The officials say the intelligence shows that the strikes are inconsistent with the kind of attack that would have been launched from Yemen.
"Iran will not stop their misbehavior until the consequences become more real, like attacking their refineries, which will break the regime's back", Graham wrote on Twitter in the hours after the attack.
Additional devices that missed their targets were recovered northwest of the facilities and are being jointly analyzed by Saudi and USA intelligence, The Associated Press reported.
The images Sunday come from the European Commission's Sentinel-2 satellite.
Iran has denied responsibility for the attack, accusing Pompeo of "max deceit", as the country's Foreign Minister Mohammad Javad Zarif tweeted Saturday.
Separately, KUNA said authorities would investigate reports of drones flying over Kuwait.
In July 2018, the president first said "no preconditions". The strikes in Saudi Arabia may all but rule out such a move anytime soon despite pleas by Western leaders led by French President Emmanuel Macron. But you know, Lulu, these attacks happen as the kingdom is looking to sell off a slice of Saudi Aramco in an initial public offering, which could be worth hundreds of billions of dollars for the kingdom.
USA oil prices have been trading in a belt between $50 and $60 a barrel in the past six months.
Muhammad al-Bukhaiti told The Associated Press on Sunday that the USA allegations that Iran was behind the attack reflected "political bankruptcy" of the administration in Washington.
There would be worries that the global oil supply is more insecure and that more attacks may be coming.
"The United States wholeheartedly condemns Iran's attack on Saudi Arabia and we call on other nations to do the same", he said in a speech to an annual meeting in Vienna of the U.N. nuclear watchdog IAEA.
"The vulnerability of Saudi infrastructure to attacks, historically seen as a stable source of crude to the market, is a new paradigm the market will need to deal with", said Virendra Chauhan, a Singapore-based analyst at industry consultant Energy Aspects.
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