"Saudi Arabia oil supply was attacked".
In a Sunday evening tweet, Trump did not share the definitive accusation against Iran, instead saying the USA had "reason to believe that we know the culprit. but are waiting to hear from the Kingdom [of Saudi Arabia] as to who they believe was the cause of this attack".
Yemen's Iranian-backed Houthi rebels claimed to have carried out the attack, but Washington has blamed Iran itself. Aramco could consider declaring force majeure on some global shipments if the resumption of full capacity at Abqaiq takes weeks, they said.
The attack dimmed hopes for potential nuclear talks between Trump and Iranian President Hassan Rouhani at the UN General Assembly this week.
Officials said the photos show impacts consistent with the attack coming from the direction of Iran or Iraq, rather than from Yemen to the south.
Iraq denied that its territory was used for an attack on the kingdom.
On Twitter, Pompeo accused Iran of committing "nearly 100 attacks" on a Saudi oilfield and refinery. "The US has the greatest power to seek balance through engagement and that starts by returning to our obligations under the Iran deal and getting all equities to the table and off of the battle fields", he said.
On Sunday, Senior US officials, including the Vice President Mike Pence and Defense Secretary Mark Esper, were seen at the White House for a National Security Council meeting about the attack on Saudi Arabia's oil infrastructure.
Actions on any side could break into the open a twilight war that has been raging just below the surface of the wider Persian Gulf in recent months.
The allegations have, however, been dismissed by Iran.
It halted production of 5.7 million barrels of crude a day, more than half of Saudi Arabia's global daily exports and more than 5% of the world's daily crude oil production.
It remains unclear how King Salman and his assertive son, Crown Prince Mohammed bin Salman, will respond to an attack targeting the heart of the Saudi oil industry.
US gasoline futures jumped 11%, while USA heating oil futures rose about 6.5% at the open.
The devastating attack over the weekend halved Saudi Arabian oil production and could fuel a crisis in the region, it has been claimed.
Saudi officials now are trying to restore about of third of lost oil output by Monday, Sept. 16, the WSJ also reported.
Market sources say an announcement by the United States that it will prepare to release its oil reserve helped limit the price surge.
The president wrote that he had authorized the release of oil from the Strategic Petroleum Reserve, "in a to-be-determined amount sufficient to keep the markets well-supplied".
President Donald Trump said the USA is "locked and loaded" to act against Iran.
Houthi leader Muhammad al-Bukhaiti reiterated his group's claim of responsibility, saying it had exploited "vulnerabilities" in Saudi air defences to strike the targets. In fact, Treasury Secretary Steven Mnuchin said last week that "the president has said that he is prepared to meet with no conditions".
In July 2018, the president first said "no preconditions".