Oil prices moved higher on Wednesday after U.S. forces struck Tehran and Washington reinstated its naval blockade of Iranian ports near the Strait of Hormuz, according to CNBC.

The report ties the rise in prices directly to the escalation between the United States and Iran, with the renewed military action and the naval blockade cited as the immediate drivers of the market move.

The Strait of Hormuz, which the blockaded Iranian ports sit near, is one of the world’s most closely watched shipping routes for energy supplies. Disruptions or the threat of disruptions in the region have historically influenced global oil prices.

CNBC reported that the blockade of Iranian ports was reinstated by Washington, indicating a return to a measure that had previously been in place. The outlet did not specify in the available material how long the blockade might last or what conditions could lead to its removal.

The available source material does not provide specific figures for how far oil prices rose, nor does it detail the scope of the U.S. strikes on Tehran or the response from Iranian authorities. Readers should treat those specifics as unconfirmed until further reporting is available.

As the situation develops, market participants and observers will be watching for additional details on the military action, the blockade’s enforcement, and any effect on the flow of energy through the region.