By Darren Boyle for MailOnline
Published: 16:14 BST, 21 July 2018 | Updated: 16:14 BST, 21 July 2018
Iran may block oil tankers from using the Strait of Hormuz in response to possible US sanctions over the country's nuclear programme.
US President Donald Trump unilaterally pulled out of a 2015 deal signed by President Obama.
The international accord allowed experts to inspect Iranian nuclear sites. Tehran also agreed to reduce its stocks of enriched nuclear material.
Iran has threatened to block oil tankers transiting through the Strait of Hormuz
President Hassan Rouhani, pictured, made the threat in response to a plan by US President Donald Trump to impose new sanctions on Iran after he pulled out of the 2015 nuclear deal
Trump has threatened to impose sanctions on Iran. In response, Iranian president Hassan Rouhani said Tehran could block oil tankers using the narrow Strait of Hormuz - cutting off supplies from the Gulf.
Iran's supreme leader Ayatollah Ali Khamenei backed his president and said: 'If Iran's oil is not exported, no regional country's oil will be exported.
Rouhani's apparent threat