Iran has once again closed the Strait of Hormuz, a key waterway for global oil shipments. The move came on Saturday, June 20, 2026, just days after a fragile ceasefire agreement with the United States.
Iran’s Islamic Revolutionary Guard Corps (IRGC) and top military command announced the closure. They blamed the United States and Israel for violating the recent peace deal, also known as the Islamabad Memorandum. Officials pointed to continued Israeli strikes in Lebanon and alleged US failures to honor ceasefire terms as the main reasons.
The Strait of Hormuz carries about one-fifth of the world’s oil supply. Iran warned ships to stay away, saying their safety could not be guaranteed. This sudden step has raised fears of higher oil prices and disruptions in global energy markets.
The closure is described as the “first step” in response to the alleged breaches. Iran’s military said further actions may follow if the “aggression” continues. This comes amid renewed fighting between Israel and Hezbollah in Lebanon, which has tested the new truce.
US Vice President JD Vance said talks with Iran in Switzerland are still expected soon. However, the latest developments have added uncertainty to diplomatic efforts. The Trump administration has called the recent memorandum a step toward peace, but critics worry the deal is already under strain.
The Strait of Hormuz has seen repeated tensions this year. Earlier closures and threats during the Iran conflict caused major shipping delays and higher insurance costs for tankers. Many vessels remain cautious about passing through the area.
