Iran rejects US claim it struck oil assets
Iran has dismissed accusations by the US it was behind attacks on Saudi oil plants that disrupted world oil production and warned that US bases and aircraft carriers in the region are in range of its missiles.
Yemen's Iran-aligned Houthi group claimed responsibility for Saturday's attacks that knocked out more than half of Saudi oil output.
But US Secretary of State Mike Pompeo said there was no evidence the attacks came from Yemen and accused Iran of "an unprecedented attack on the world's energy supply."
Iranian foreign ministry spokesman Abbas Mousavi dismissed the US claim as "pointless". A senior Revolutionary Guards commander warned that the Islamic Republic was ready for "full-fledged" war and that US military assets were within range of Iranian missiles.
"Everybody should know that all American bases and their aircraft carriers in a distance of up to 2000 kilometres around Iran are within the range of our missiles," the head of the Revolutionary Guards Corps Aerospace Force Amirali Hajizadeh was quoted as saying by the semi-official Tasnim news agency.
State-run oil company Saudi Aramco said the strikes would cut output by 5.7 million barrels per day, or more than 5 per cent of global crude supply.
Aramco gave no timeline for when output would resume. A source close to the matter told Reuters the return to full oil capacity could take "weeks, not days".
The kingdom, the world's top oil exporter, ships more than 7 million barrels of oil to global destinations every day.
The United States said it was ready to tap its emergency oil reserves if needed after the attack on two oil plants, including the world's biggest petroleum processing facility in Abqaiq.
"Abqaiq is the nerve centre of the Saudi energy system. Even if exports resume in the next 24-48 hours, the image of invulnerability has been altered," Helima Croft, global head of commodity strategy at RBC Capital Markets, told Reuters.
Saudi authorities have yet to directly blame any party for Saturday's pre-dawn strikes, which they said involved drones.
US Secretary of State Mike Pompeo said there was no evidence the attacks came from Yemen, where a Saudi-led military coalition has been battling the Houthis for over four years in a conflict widely seen as a proxy war between regional rivals Sunni Muslim Saudi Arabia and Shi'ite Iran.
Riyadh has accused Iran and its proxies of being behind previous attacks claimed by the Houthis on oil pumping stations and Shaybah oilfield, charges Tehran denies.
Some Iraqi media outlets said the attack originated from Iraq, where Iran-backed paramilitary groups have wielded increasing power but Iraq denied this on Sunday and vowed to punish anyone who intended to use Iraq as a launchpad for attacks in the region.
Regional tensions have escalated after Washington quit an international nuclear deal and extended sanctions on Iran to choke off its vital oil exports, a move supported by US Gulf allies Saudi Arabia and the United Arab Emirates.
The attack comes after US President Donald Trump said a meeting with Iranian President Hassan Rouhani was possible at the United Nations General Assembly in New York later in September. Tehran ruled out talks until sanctions are lifted.
"Amid all the calls for de-escalation, Iran has now launched an unprecedented attack on the world's energy supply," Pompeo said in a Twitter post on Saturday.