TEHRAN – The Islamic Revolution Guards Corps fired warning shots at two vessels attempting to transit the Strait of Hormuz without authorization over the past 24 hours, as the country’s designated shipping route through the strategic waterway continued to attract most commercial traffic, according to maritime data and Iranian authorities on Wednesday.
Data from maritime intelligence firm Kpler showed that nine of the 11 vessels transiting the Strait on Tuesday used the route designated by Tehran, with the ships mainly carrying crude oil, petroleum products, liquefied gas, methanol and iron ore linked to Iran’s maritime trade.
Kpler said the vast majority of vessels using the strategic waterway are now sailing through the Iranian-designated corridor.
The warning shots followed similar incidents reported earlier this week after Iranian authorities said vessels had attempted to use unauthorized routes through the Strait. The IRGC has previously warned it will take action against ships failing to comply with designated transit arrangements.
The developments come as the Persian Gulf Strait Authority (PGSA) said more than 200 non-Iranian vessels have coordinated with the authority to transit the Strait since the June 17 Islamabad Memorandum of Understanding (MoU) between Tehran and Washington.
The PGSA was established after the outbreak of the U.S.-Israeli war against Iran in late February as Tehran tightened oversight of shipping through and around the Strait of Hormuz.
Tensions have escalated in recent weeks following repeated U.S. violations of the June 17 agreement.
On July 7, Washington revoked a license authorizing Iranian oil sales and launched airstrikes targeting Iran after Iranian forces moved to stop shipping using illegal routes in breach of the MoU. 
The United States has since carried out multiple rounds of strikes against Iranian territory, while President Donald Trump declared the ceasefire “over” during a NATO summit in Ankara on July 8.
 Tehran has since said it no longer considers itself bound by certain provisions of the accord, stating that Washington has “completely dismantled” the agreement.
Iran’s parliament is also reviewing legislation that would formalize Tehran’s control over the Strait of Hormuz by establishing a legal framework for managing the strategic waterway, underscoring what officials describe as Iran’s determination to maintain authority over the passage despite U.S. pressure.