The tiny island is home to one of the most critical pieces of Iran's energy infrastructure.
19 hours ago
Alys Daviesand
Frank Gardner,security correspondent, in Riyadh
Donald Trump has said the US military has bombed a small island off the coast of Iran - home to a major oil terminal that is considered the country's economic lifeline.
The US president said Kharg Island's military facilities were "totally obliterated" but that it had held off targeting its oil infrastructure.
Trump, however, warned that he would reconsider the decision not to target oil facilities on the island should Iran or others "do anything to interfere" with the safe passage of ships through the Strait of Hormuz - one of the world's most important shipping channels, located south of Iran's coast.
Iran's military said oil and energy infrastructure belonging to firms working with the US would "immediately be destroyed" should Kharg's oil infrastructure be attacked.
Kharg Island is a small rocky outcrop just 15 nautical miles (24km) off the coast of Iran.
Despite its size, it is one of the most critical pieces of Iran's energy infrastructure.
The US striking this small but vital island in the northern Gulf is like going for Iran's economic jugular vein.
Ninety percent of Iran's crude oil comes through a terminal on the island - transported through pipes from the mainland.
Very large tankers - capable of carrying up to 85 million gallons of oil - are able to come up to the island's long jetties to pick up the oil. The island's coast is close enough to deep waters, unlike the shallower coast of the mainland.
The tankers then come back down the Gulf and out of the Strait of Hormuz, to China - the main buyer of Iranian oil.
A terminal for the export of Iranian oil, the island provides a major source of revenue for the Islamic Revolutionary Guard Corps (IRGC).
Trump said on Friday that the US Central Command (Centcom) had "executed one of the most powerful bombing raids in the History of the Middle East and totally obliterated every MILITARY target in Iran's crown jewel, Kharg Island".
He added that "for reasons of decency" he had "chosen NOT to wipe out the Oil Infrastructure on the Island".
Centcom said US forces had struck "more than 90 Iranian military targets on Kharg Island, while preserving the oil infrastructure".
The regional military command unit said it had destroyed naval mine storage facilities, missile storage bunkers and numerous other military sites.
Iranian state media reported that no damage was done to the island's oil facilities. The semi-official Fars news agency said US attacks targeted air defences, a naval base, airport control tower and a helicopter hangar.
Ehsan Jahanian, political deputy to the governor of Bushehr province in southern Iran, said "no military personnel, oil company employees, or island residents suffered casualties in the attack, and all sectors are continuing their routine activities".
Jahanian said the process of exporting oil from Kharg was "fully under way", and the "activities of companies based on the island are continuing without interruption", according to a report by the IRGC-affiliated Tasnim news agency.
Following the strikes, the country's military warned that oil and energy infrastructure belonging to firms working with the US would "immediately be destroyed and turned into a pile of ashes" if its energy facilities were attacked.
Military action to destroy the island's infrastructure would be hugely damaging to Iran.
It would also present a significant escalation to the conflict.
Two weeks into the war, Iran still has the capacity to launch large numbers of low-cost, high-explosive drones at its Gulf Arab neighbours as well as at shipping vessels.
It could, potentially, expand those targets to include vital infrastructure like desalination plants that provide drinking water for millions.
Justin Crump, a military analyst and former British Army officer, said the bombing was an attempt by Trump to deter Iran from escalating the conflict further.
"He's showing it as being merciful but saying he could be more punishing to the IRGC" by targeting the oil facilities, Crump, who is also CEO of intelligence consultancy Sibylline, told BBC Radio 4's Today programme.
Trump previously stated that the aim of the war was so that Iran's people could rise up and overthrow the Islamic Republic's regime.
While he has since expressed other motivations for the war, Crump said targeting the island's oil infrastructure was "difficult" as it would destroy the country's economic lifeline for a long period of time.
"That doesn't really say much for their [the Iranian people's] future," he said, adding that, when the island's oil infrastructure was destroyed during the Iran-Iraq war in the 1980s, it took a long time to rebuild.
There has been speculation about whether US forces would at some point attempt to take over Kharg Island.
It seizure would not only choke off Iran's oil exports but could also provide a platform from which to carry out attacks against the mainland.
The Pentagon has declined to comment.
Taking the island would effectively cut off the IRGC's economic lifeline, impacting its ability to be able to conduct war, security analyst Mikey Kay, from the BBC's Security Brief, says.
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