UPDATE — this extends our earlier coverage: Iran Denies Any Talks With US Are Underway, Contradicting Trump

A cargo vessel was struck by an "unknown projectile" early Tuesday in the Strait of Hormuz off Oman, Britain's maritime security agency UKMTO said, according to France 24.

President Trump said Monday that US-Iran negotiations were continuing regardless of Tehran's denials, warning Tehran had a "last chance before decapitation" to reach a deal on the strait and its nuclear programme, according to France 24.

Oil prices rebounded on the renewed threat to shipping through the strait, according to the Global Banking & Finance Review.

Iran continues to deny direct talks are underway, even as Trump claims ceasefire negotiations are active, the Washington Post reported.

The Strait of Hormuz is a critical oil chokepoint. An attack on shipping there, whatever its source, raises the risk of wider disruption to global energy supply as Washington and Tehran spar over whether talks even exist.

Watch for whether UKMTO or other agencies identify the projectile's origin, further shipping alerts in the strait, and whether Trump's deadline produces a confirmed US-Iran meeting or military escalation.