Washington, May 27 -- The White House has delivered a sharp, high-stakes rebuttal to Tehran, completely dismantling claims broadcast by state-backed networks regarding an imminent diplomatic breakthrough over crucial maritime trade corridors.

The US administration issued a definitive denial of assertions that Washington and Tehran were on the verge of finalising a preliminary blueprint aimed at restoring maritime commerce through one of the world's most critical energy transit choke points.

Calling the report a "complete fabrication", the White House denied claims aired by Iranian state television that the United States had proposed a draft Memorandum of Understanding involving the lifting of the naval blockade on Iran and the withdrawa...