United States President Donald Trump has announced a full naval blockade of the Strait of Hormuz, one of the world's most critical oil shipping chokepoints, following the breakdown of US-Iran diplomatic negotiations in Pakistan. The declaration marks a dramatic escalation in tensions between Washington and Tehran, with American warships ordered to enforce the blockade immediately. Iran's government has warned it will respond with force to any attempt to restrict passage through the waterway, which handles roughly one-fifth of global oil supply.
The blockade order targets all Iranian oil exports transiting the narrow 33-kilometre-wide strait, which separates Iran from Oman and the United Arab Emirates at the mouth of the Persian Gulf. Trump signed the executive directive after peace talks hosted in Islamabad fell apart over disagreements on Iran's nuclear enrichment program and sanctions relief. The US Navy's Fifth Fleet, headquartered in Bahrain, has been placed on heightened alert alongside carrier strike groups already deployed to the region.
The Strait of Hormuz has been a flashpoint for US-Iran confrontations for decades, with previous incidents including tanker seizures, drone shootdowns, and naval standoffs during both the Trump and Obama administrations. Trump withdrew the United States from the Joint Comprehensive Plan of Action in 2018 during his first term and reimposed sweeping sanctions on Iran's oil sector, a policy he has continued to intensify since returning to office. Global crude oil prices surged more than 8 per cent within hours of the announcement, with Brent crude climbing above $95 per barrel on fears of prolonged supply disruption.
Iranian Foreign Minister Abbas Araghchi condemned the blockade as an act of war and said Tehran reserves the right to defend its sovereign waters and economic lifelines. China and Russia, both major purchasers of Iranian crude, called for restraint and urged an immediate return to negotiations under United Nations auspices. Australian Prime Minister Anthony Albanese said Canberra was monitoring the situation closely and consulting with allies, while Defence Minister Richard Marles confirmed the Australian Defence Force had not received any request to contribute assets to the operation.
Energy analysts warn that a sustained blockade could trigger a global oil price shock, with petrol prices in Australia potentially rising by 20 to 30 cents per litre within weeks if supply disruptions persist. The United Nations Security Council is expected to hold an emergency session to address the crisis, though any resolution faces likely vetoes from Russia and China. Financial markets across Asia and Europe have already reacted sharply, with the ASX 200 falling 2.3 per cent in early trading as investors brace for heightened geopolitical uncertainty across the Middle East.