Iran war updates: Trump says US to block Hormuz, IRGC insists strait open

As of April 13, 2026, tensions in the Middle East have surged following the collapse of peace talks in Islamabad between the U.S. and Iran. In response, U.S. President Donald Trump has ordered a naval blockade, while Iran’s Islamic Revolutionary Guard Corps (IRGC) continues to claim operational control over the Strait of Hormuz. 

U.S. Blockade and Military Action 

• Official Start: U.S. Central Command (CENTCOM) announced the blockade would begin today, April 13, at 10:00 AM ET (14:00 GMT).
• Targeted Traffic: The blockade is "impartially" enforced against all vessels entering or exiting Iranian ports.
• Exceptions: CENTCOM clarified that ships transiting to and from non-Iranian ports (such as those belonging to U.S. Gulf allies) will not be impeded.
• Reasoning: Trump cited Iran's refusal to abandon its nuclear ambitions and its attempt to collect "illegal tolls" from passing vessels as primary reasons for the escalation.
• Mine Clearing: The U.S. Navy has also begun de-mining operations in the strait to ensure safe passage for allied shipping.  

Iran's Response and Counter-Threats

• IRGC Warning: The IRGC declared that any military vessel approaching the Strait of Hormuz would be considered in violation of the current ceasefire and would be "dealt with severely".
• Control Claims: Iranian officials insist the strait is under their "intelligent control" and remain defiant, with the IRGC warning that any "wrong move" will trap enemies in a "deadly vortex".
• Ceasefire Status: While a fragile 15-day ceasefire is technically meant to last until April 22, both sides now view it as highly volatile following the failed Islamabad negotiations.  

Global and Economic Impact

• Oil Prices: Global markets reacted sharply, with Brent crude futures jumping nearly 8% to cross $100 per barrel.
• Shipping Disruptions: Oil tankers are reportedly steering clear of the area ahead of the 14:00 GMT blockade deadline.
• Diplomatic Fallout: Iranian Foreign Minister Abbas Araghchi accused the U.S. of "shifting goalposts" and "maximalism" during the failed negotiations.