The US military has said it will begin a blockade of all Iranian ports at 14:00 GMT on Monday after President Donald Trump announced the naval blocking of the Strait of Hormuz through which a fifth of global crude supply normally passes.
The announcement comes after talks for a long-term peace plan ended on Saturday without a deal. The US-Iran talks in the Pakistani capital, Islamabad, came days after the US agreed to a ceasefire with Iran.
Trump’s threat is the latest escalation in the war, pushing oil prices above 100 dollars a barrel and rattling Asian markets amid fears of a prolonged disruption to global supplies.
Israeli attacks on Lebanon continue while the US and Iran are heading towards another face-off.
Here are the latest developments on day 45 of the conflict: