US forces have escalated enforcement of the maritime blockade against Iran, with Marines boarding a commercial tanker in the Gulf of Oman after it attempted to breach the restricted zone.
The operation marks a significant hardening of the US military posture in the region, moving from monitoring to direct physical intervention against non-compliant vessels.
According to reports from iDNES.cz, US forces have diverted three merchant ships attempting to break the blockade, disabled one vessel that failed to comply, and boarded another for inspection.
The actions were carried out by US Marines and naval units operating under the authority of US Central Command (CENTCOM).
This represents a tangible increase in the operational tempo of the blockade, which officially began earlier this week.
The direct involvement of US personnel on commercial vessels in one of the world's most critical energy chokepoints introduces acute geopolitical risk to global shipping.