Meanwhile the U.S. military said on Wednesday it launched a new round of strikes on Iran at President Donald Trump's direction, marking a 12th successive night of American attacks. The Yemen-based militants, who control areas near the Bab el-Mandeb Strait on the opposite end of the Arabian Peninsula from the Strait of Hormuz, said on Monday they were imposing a naval blockade on Saudi Arabia in what some analysts have viewed as a tactical move by Iran to seek leverage in any diplomatic efforts to end the war.
Also Read: Trouble is brewing at Middle East's two key chokepoints Even before the renewed threats to shipping traffic in the Red Sea, Iran's near-total blockade of the Strait of Hormuz had stoked inflation around the world, pushing up oil prices and squeezing U.
S. gasoline consumers at a time when the unpopular war has put Trump's Republican allies under pressure ahead of congressional elections in November. Five tankers changed course in the Red Sea to avoid the Bab el-Mandeb Strait on Wednesday, and three tankers loaded with Saudi oil for China and India made U-turns on Tuesday.
Then the Houthis said their forces carried out missile and drone strikes on two Saudi oil tankers in the Red Sea, identifying them as the Encelia and the Layla. Also Read: Indian refiners halt Iraq oil loadings on rising Hormuz risk A maritime security source said Encelia had transmitted a distress call, reporting it had been struck by a missile near the Saudi port of Jizan in the Red Sea late on Wednesday.
British maritime risk management group Vanguard said the Saudi-flagged tanker was struck by an unknown projectile on its starboard side about 70 nautical miles southwest of Saudi Arabia's Al Shuqaiq. The attack on the Layla remained unconfirmed. Millions of barrels per day of Saudi oil have been heading to the kingdom's Red Sea port of Yanbu to avoid the Strait of Hormuz.
If shipments cannot pass through the Red Sea's southern strait, they have only the northern route through the Suez Canal, adding weeks to the journey and significantly raising costs. Moreover, the Houthi threat to impose a naval blockade against Saudi Arabia could significantly widen the war and strain a U.
S. military, current and former U.S. officials said. TRUMP THREATENS INFRASTRUCTUREBefore the Red Sea flare-up, Trump vowed on Wednesday to destroy an Iranian bridge or power plant every time Iran shoots at a ship in the Strait of Hormuz. Iran's joint military command in turn warned that if Trump's threat against infrastructure was carried out, Iranian forces would target regional oil, gas, electricity and economic infrastructure and prevent the export of "even a single drop of oil," Iranian state media reported.
Hours later, Iran's Revolutionary Guards reported an explosion in what it called a mined route south of the Strait of Hormuz, saying one of three oil tankers had caught fire while the other two turned back. The Guards said the strait was under their control and "completely closed," warning that no tanker would be allowed to enter or leave without coordination with Iran.
In 12 straight days of attacks since a June ceasefire fell apart, American strikes have widened from the south to western and central areas of Iran. The U.S. military's Central Command said it would continue to "further degrade" Iran's ability to threaten ship traffic.
Iranian state media said on Thursday the U.S. attacked one location in the city of Bushehr, near the country's only operating commercial nuclear power reactor, for the second time in two days, and that two people were killed in a U.S. missile strike near the passenger terminal at the Shalamcheh border crossing between Iran and Iraq.
Despite triumphant statements from Washington, Iran has demonstrated it retains missile and drone capabilities. Iran pounded vital water desalination and energy plants in Kuwait this week and targeted U.S. military assets there, in Bahrain and in Jordan.
Each side has also reported an escalating human toll. An Iranian health ministry official said 53 civilians had been killed and 592 wounded since late last month. Since the U.S. and Israel launched the war on February 28, thousands of people have been killed and millions displaced.
The U.S. military has said it never targets civilians, which could violate the 1949 Geneva Conventions on humanitarian conduct in war. Trump, however, has repeatedly threatened to attack civilian infrastructure, which may be targeted if it is also being used for military purposes, provided the civilian harm is not excessive.
The war has also led to the deaths of 18 U.S. service members and injured more than 450 troops. Trump attended a ceremony on Wednesday at Dover Air Force Base in Delaware for four U.S. service members killed in Iranian attacks on military bases over the last few days - three in Jordan and one in Iraq.
"For me it's one of the hardest things to do as a president. But it has to be done," Trump said before leaving for the ceremony. Later, at a speech in Georgia, Trump struck a different tone, saying of the war, "I call it a skirmish.