Iran fully closed the Strait of Hormuz on Saturday and fired on at least three commercial ships attempting to pass, reversing a brief reopening from the previous day. The closure escalates the standoff with the US blockade of Iranian ports that has been ongoing since late February 2026. Multiple outlets confirm the closure and attacks; the Guardian reports Iran's parliament threatened the strait could close again if the US blockade continues, while the Trump administration signals the blockade will remain until a 'transaction' is reached.