Oil prices remained largely unaffected by US President Donald Trump’s announcement that the US will assist in freeing stranded vessels in the Strait of Hormuz.

Brent crude futures were flat on Monday morning, at $108.11, down 0.06%, with traders showing little optimism that Trump’s plan would resolve the ongoing energy disruption.

On Sunday, Trump said the US would help “free up” vessels in the Gulf starting Monday, although details on how the operation, dubbed “Project Freedom,” would unfold were sparse.

It remains unclear whether the US navy would be involved in escorting ships, a proposal previously dismissed by officials who cited the need for more preparation.

US Central Command later clarified that it would support vessels seeking to transit the waterway, but did not mention naval escorts.

The operation will involve guided-missile destroyers, aircraft, unmanned platforms, and 15,000 service members.

Iranian officials have signalled their opposition, with Ebrahim Azizi, head of the Iranian parliament’s National Security Commission, warning that any US interference would violate the truce in place since April 7.

Meanwhile, the UK’s military reported an attack on a tanker off the UAE’s coast, hours after another incident involving a bulk carrier near Iran. No casualties were reported.

Iran’s threats have drastically reduced maritime traffic in the strait, which normally handles 20% of global oil and gas shipments.

Goldman Sachs estimates the conflict has cut global daily production by 14.5 million barrels.

Brent prices have surged nearly 50% since the war began, with analysts predicting high prices will persist even after a potential peace deal due to the backlog of energy and the clearing of Iranian mines.

On the most recent day for which data is available, only 20 vessels crossed the Strait, compared to an average of 129 before the war began in late February, according to UNCTAD and maritime intelligence platform Windward.