The British military said a tanker came under attack early Tuesday in the Strait of Hormuz off Oman, the latest assault to target shipping in the strategic waterway.
The United Kingdom Maritime Trade Operations center said the ship reported over the radio it had been hit by an unknown projectile.
Two other ships were attacked in the strait over the last day, with Iran' paramilitary Revolutionary Guard claiming those assaults.
A fifth of all oil and natural gas that was traded passed through the Strait of Hormuz in peacetime, but Iran has maintained a chokehold on the waterway since the start of the war on Feb.
Recent rounds of attacks between Iran and the United States come as the two countries vie for control of the strait.
The United States military said late Monday it was carrying out its 10th consecutive night of strikes on Iran in a push to reopen the Strait of Hormuz.
The renewed bombings followed the death of another American service member, and came after Iran launched attacks on American allies Kuwait, Jordan and Bahrain, home of the US Navy's 5th Fleet.
US Central Command said on social media that the latest strikes "are designed to further degrade Iranian military capabilities used to attack commercial shipping" in the strait.
Even as the US and Iran inch closer to all-out war again, glimmers of hope appeared on the diplomatic front, as Iran's interior minister traveled to Pakistan, a key mediator in the conflict, for talks.
The interim deal signed last month that was meant to end the fighting has crumbled.
Shipping through the Strait of Hormuz - a vital supply route for world energy supplies - has largely stalled.
And as fighting intensifies, both sides have targeted civilian infrastructure relied on by millions of people.
The escalation has pushed oil prices higher in recent weeks.
Benchmark Brent crude traded Monday above $88 a barrel and regular gasoline in the US climbed to an average of USD 4 a gallon, keeping pressure on Americans' wallets ahead of midterm elections this fall.
A new potential threat to energy markets emerged Monday after Iran-backed rebels in Yemen said they planned to prevent Saudi Arabia from shipping in the Red Sea, an alternate route for oil exports during the war.
The US military identified two soldiers who were killed in Jordan in attacks that....
