President Trump ordered the reinstatement of a US naval blockade on the Strait of Hormuz on Monday, declaring a 20 percent toll on every cargo shipment transiting the waterway as American and Iranian forces continued to exchange strikes in the region.

Trump made the announcement as Washington and Tehran escalated military action over the strait, one of the world's most critical chokepoints for oil and commercial shipping.

The 20 percent levy applies to all cargo vessels, the Wail confirmed, with no exemptions named in Monday's declaration. The strait handles roughly a fifth of global oil supply, and the move drew immediate concern from shipping and energy markets.

No end date for the blockade or the toll has been set. The White House did not provide a legal framework for the levy under existing maritime or international trade law.

Iran has not formally responded to the reimposition of the blockade as of Monday evening. Tehran and Washington have traded military strikes in the area in recent days, raising fears of further escalation in a waterway critical to global energy supply chains.

Congressional leadership has been briefed, according to sources familiar with the discussions. Committee hearings on the administration's legal authority are expected to be scheduled this week.