Three empty Iranian oil tankers with a capacity of 5 million barrels have reportedly breached a US naval blockade, escalating a fragile ceasefire and pushing Brent crude back above $100 a barrel.
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Three empty Iranian oil tankers with a capacity of 5 million barrels have reportedly breached a US naval blockade, escalating a fragile ceasefire and pushing Brent crude back above $100 a barrel.

A fragile ceasefire between the United States and Iran is under new pressure after a maritime intelligence firm reported three empty Iranian oil tankers broke through a US naval blockade. The event, which follows days of escalating clashes in the Strait of Hormuz, sent Brent crude futures up 0.67% to $100.73 a barrel, highlighting the market’s sensitivity to supply risks in the critical waterway.
"This eruption in violence could be seen as an escalation. However, they also demonstrate the volatility of this conflict," said Chris Featherstone, a political scientist at the University of York, in comments to Al Jazeera. Former US diplomat Donald Jensen characterized the naval clashes as a "controlled escalation," arguing both nations are "trying to show their resolve" while diplomatic efforts continue.
The report from TankerTrackers on May 8 noted the three vessels have a combined capacity to load 5 million barrels of crude. It came just two days after US Central Command confirmed one of its fighter jets had disabled the rudder of another Iranian tanker, the M/T Hasna, to prevent it from reaching port. West Texas Intermediate crude also rose, gaining 0.47% to $95.26 a barrel.
The breach of the blockade threatens to unravel a ceasefire that has been in place since April 8. At stake is the passage through the Strait of Hormuz, a conduit for one-fifth of the world’s oil supplies that Iran has largely closed since hostilities began. The last time tensions flared this significantly in the region, oil prices jumped more than 5% in a single session, underscoring the high financial stakes of the conflict.
The military actions occurred as Washington awaits a response from Tehran on its latest peace proposal, delivered via Pakistani mediators. US President Donald Trump has insisted the ceasefire remains in effect, even as he confirmed US forces retaliated for what he described as an attack on three Navy destroyers. "They trifled with us today. We blew them away," Trump said, while also stating there was no damage to US vessels.
Iran’s joint military command presented a different account, accusing the US of violating the truce by targeting an Iranian oil tanker and other ships, as well as civilian areas on Qeshm Island. The United Arab Emirates also reported intercepting missile and drone strikes on Friday, further evidence of the widening regional scope of the conflict.
Analysts suggest the military posturing may be a tactic to gain leverage in negotiations. "The US is trying to loosen Iran’s chokehold upon the Strait of Hormuz while Iran remains determined to push back," Ali Vaez, director of the Iran Project at the International Crisis Group, told Al Jazeera. He added that a diplomatic resolution would likely require "painful concessions" from both sides.
Despite the exchange of fire, diplomatic channels appear to remain open. A spokesperson for Iran’s Foreign Ministry confirmed it was reviewing the US proposal, signaling that a path to de-escalation, though narrow, still exists.
This article is for informational purposes only and does not constitute investment advice.