Iran has warned neighboring countries hosting US troops that Iran will not hesitate to retaliate by attacking American bases if Washington launches an attack. Tensions between the two countries continue to rise following President Trump's threat to intervene.
Some US personnel have been advised to leave the Al Udeid base in Qatar, although there is no sign of a large-scale troop withdrawal so far.
Trump has continued to threaten tough action against Iran over its crackdown on protesters, with Israeli assessments suggesting US intervention is being considered.
Western officials say the Iranian government remains in control despite the unprecedented scale of protests, while the death toll continues to rise.
The tensions come as Iran is still recovering from last year's conflict and faces pressure on its regional influence.
