An attack on a vessel near the Strait of Hormuz and a rebound in oil prices on Tuesday underscored doubts that the U.S.-Iran war was nearing a resolution, as Tehran pushed back against President Donald Trump's assertion that talks were under way.

Trump claims Hormuz deal as Iran denies any agreement, leaving oil markets and investors bracing for what's next.

Oil prices drop as Trump postpones military action against Iran, aiming for a nuclear deal amid rising production quotas.