Iran stood firm Sunday on its conditions for reopening the Strait of Hormuz, despite US President Donald Trump's rejection of the proposal that had created some optimism for breaking the Mideast war stalemate.

The waterway is key to the world's energy supply and is now central to the conflict between Washington and Tehran, which was triggered nearly seven months ago with deadly strikes on Iran.

Iran's plan called for a cessation of all hostilities in the Middle East, including in Lebanon, according to Foreign Minister Abbas Araghchi, and fulfilling conditions in the ceasefire deal that fell apart months ago.

That agreement, which dissolved during fighting over Hormuz, called for the release of frozen Iranian assets, the lifting of sanctions on Iranian oil and an end to the US naval blockade.

"Our conditions are clear, and any move toward reopening the Strait of Hormuz is contingent upon these condition...