Iran has threatened to strike American military bases if Donald Trump orders any attack on Tehran.
US sites in Saudi Arabia, UAE and Turkey could be targeted as part of retaliatory measures against Washington.
President Trump has warned the US will take very strong action if the Iranian regime hangs pro-democracy protesters with a young shopkeeper set to be executed.
Erfan Soltani, 26, is feared likely to become the first person executed over the demonstrations, with reports saying he would be hanged on Wednesday morning local time.
Follow the latest updates on the Iranian protests below
Sydney stands in solidarity with Iran protesters
Tehran mass funeral to include 300 bodies, says state TV
Iranian state television said on Wednesday that a mass funeral in Tehran will include the 300 bodies of security force members and civilians kills in the unrest over the past few weeks.
The funeral is expected to take place at Tehran University under heavy security.
READ MORE: How Trump can punish Iran for executing protesters - from assassinating or abducting the Ayatollah to bombing Tehran and cyber attacks
Internet blackout enters sixth day
According to NetBlocks, an internet activity monitor, Iran is in its sixth day of an communications blackout.
The brutal regime instate the blanket ban last Thursday, amid the growing mass protests.
Though Iranians were previously able to use Starlink satellite internet terminals to get messages and information out of the country, it appears there have been jammed by what experts are calling military-grade technology
US military personnel told to leave Qatar base
Some personnel were advised to leave the U.S. military's Al Udeid Air Base in Qatar by Wednesday evening, three diplomats told Reuters.
The U.S. embassy in Doha had no immediate comment.
Al Udeid is the Middle East's largest U.S. base housing around 10,000 troops. Ahead of the U.S. air strikes on Iran in June some personnel were moved off U.S. bases in the Middle East.
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