Iran's Islamic Revolutionary Guard Corps (IRGC) fired warning shots at two vessels attempting to transit the Strait of Hormuz, according to state-affiliated Press TV.
The incident marks a further intensification of Tehran's enforcement of its self-declared closure of the waterway, which remains in effect for all maritime traffic until further notice.
The action reinforces the severe operational risks facing energy traders and shipping lines.
With the IRGC actively intercepting and targeting vessels that attempt to pass through the strait, the threat to global oil supply chains remains acute.
The Strait of Hormuz handles a significant portion of the world's seaborne oil trade, and any disruption directly impacts Brent crude pricing and freight rates.
This development follows a series of aggressive moves by the IRGC, including the striking of supertankers attempting to navigate the corridor.