Iran’s attempt to choke the Strait of Hormuz has run into a problem: it cannot locate and remove all the mines it deployed in the waterway.The issue is now at the centre of high-stakes talks in Islamabad, where reopening the route has been linked to any pause in hostilities. Iranian and US teams have reached Islamabad for peace talks, with shipping access high up on the agenda. Trump has called for the immediate reopening of the Strait as part of a ceasefire. The Islamic Revolutionary Guard Corps warned ships about collision risks, and some local semi-official news organisations have published charts of routes it considers safe. Those routes remain limited, which keeps traffic below normal levels and raises insurance and transit costs. Is Iran trying to buy time so that it can have bargaining power in the peace talks?

