US President Donald Trump has said the month-long ceasefire between the US and Iran is on "massive life support".
He told reporters in the Oval Office on Monday that while the ceasefire remained in place, it was "unbelievably weak".
Iran laid out its demands to end the war and reopen the Strait of Hormuz in a counter-offer sent to the US on Sunday. Trump rejected the proposal, calling it "totally unacceptable" and a "piece of garbage".
Esmail Baghaei, a foreign ministry spokesperson for Iran, responded by saying Tehran's proposals were "responsible" and "generous".
Tehran's offer includes an immediate end to the war on all fronts - a reference to the continued Israeli attacks against Iran-supported Hezbollah in Lebanon - a halt to the US naval blockade of Iranian ports and guarantees of no further attacks on Iran, according to Iran's semi-official Tasnim news agency.
