Iran's commercial vessels and oil tankers", Iran will not allow "any exports or imports to continue" in the three major waterways. The US blockade of Iranian ports began on Monday, and the American military said on Tuesday that no vessels had made it through in the first 24 hours.  BBC Verify analyses how many ships are crossing the Strait of Hormuz. Donald Trump says China is "very happy" that "I am permanently opening" the strait, claiming he is doing it for them "and the world". Meanwhile, a senior US official tells the BBC talks on extending the ceasefire with Iran are ongoing; an Iranian spokesman says an exchange of messages is continuing about possible talks. Tehran's neighbourhoods have become "unrecognisable" with many buildings destroyed, a charity worker in Iran tells the BBC. (BBC)