US-Iran conflict: What’s the latest as the Islamabad talks stall?

Washington and Tehran remain deadlocked in negotiations over issues including the blockade of the Strait of Hormuz. The United States has cancelled a planned visit by its envoys to Pakistan, where mediators are trying to facilitate talks between the two adversaries. Iran's government insists it will not enter negotiations while the US maintains a blockade on Iranian ports, and the US president claims Iran has not made a sufficient offer.