Iran earned $5bn in oil exports in past month while it shut the strait for most other ships. That revenue is at risk.

President Donald Trump said he ordered the U.S. Navy to find and interdict any ship in international waters that has paid a toll to Iran to transit the strait.

The threat from the president has left global markets in another period of uncertainty, with questions over how the blockade will be enforced

US Navy to impose blockade today in bid to choke off flow of Iranian oil

Donald Trump says that the US is going to start blockading the Strait of Hormuz. What does this mean in practice?

Oil prices have been rising as shipping through the strait has essentially stalled since late February.

The U.S. military said it will begin stopping all ships from leaving or entering Iran's ports in line with a blockade ordered by President Donald Trump.

The U.S. blockade, set to begin at 10 a.m. ET, will apply to "any and all Ships trying to enter, or leave, the Strait of Hormuz," President Donald Trump said.

Updated marine traffic map of Iran shows shops near blocked Strait of Hormuz. Latest escalation may impact gas prices. Iran declares blockade 'piracy'

Iran earned $5bn in oil exports in past month while it shut the strait for most other ships. That revenue is at risk.

Analysts say that Iran has already moved vast quantities of its oil offshore and a full blockade would be complex to implement

The US blockade of ships using Iranian ports has come into force but several Iran-linked tankers have passed through the strait of Hormuz since it began. Lucy Hough speaks to the…

Analysts say that Iran has already moved vast quantities of its oil offshore and a full blockade would be complex to implement