Iranian state broadcaster IRIB said on Wednesday that Tehran had obtained a draft of an initial, unofficial framework for a memorandum of understanding with the United States on ending their conflict.
The White House responded to the Iranian report in an X/Twitter post later on Wednesday, calling it a "complete fabrication."
"Nobody should believe what Iranian state media is putting out," the White House wrote.
Under the reported framework, Iran would restore commercial shipping through the Strait of Hormuz to prewar levels within a month, while the United States would withdraw its military forces from the vicinity of Iran and lift a naval blockade.
State TV said the framework, which excludes military vessels and envisages Iran managing ship traffic through the strait in cooperation with Oman, was not yet finalized and that Tehran would take no steps without "tangible verification."
It added that if a final agreement was reached within 60 days, it could be approved as a binding UN Security Council resolution.
The emerging US-Iran MoU stems from indirect talks launched after the war that began in February, with Pakistan playing a central mediating role between Tehran and Washington.
Trump: No sanctions relief for uranium
US President Donald Trump said on Wednesday that Iran would not get sanctions relief in exchange for giving up highly enriched uranium, according to an interview with PBS News.
Trump later told a cabinet meeting on Wednesday that Iran very much wanted to make a deal, but the US was not yet satisfied with it.
"Iran is very much intent; they want very much to make a deal," said Trump. "So far, they haven't gotten there... we're not satisfied with it, but we will be. We will be either that or we'll have to just finish the job."
Also on Wednesday, Assistant White House Press Secretary Olivia Wales told Walla that negotiations with Iran are "progressing well" and that Trump has "made his red lines very clear."
"President Trump will only make a good deal for the American people," said Wales, "a deal that must ensure that Iran never has a nuclear weapon."
The war erupted after a sharp escalation between Iran and Israel earlier this year, with both sides exchanging missile and drone attacks that disrupted shipping in the Gulf and drew in US military involvement, raising fears of a wider regional conflict.