President Donald Trump is threatening to close off the Strait of Hormuz — a crucial waterway that he has repeatedly told Iran must be reopened unconditionally.

The US Navy will blockade the Strait of Hormuz, Donald Trump announced earlier, after talks in Islamabad failed to produce a deal between the US and Iran.

Prior to today's scheduled negotiations, Iran and the US agreed to a conditional two-week ceasefire, during which shipping traffic will be allowed through the Strait of Hormuz