A group of US Republican senators has called on Twitter to suspend the accounts of Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei and Foreign Minister Mohammad Javad Zarif.

Axar.az reports that in a letter sent to Twitter CEO Jack Dorsey, senators Ted Cruz of Texas, Marco Rubio of Florida, Tom Cotton of Arkansas and Marsha Blackburn of Tennessee threatened that the company would be subject to US sanctions law if it did not end its service to Iranian officials.

They argued that allowing Iran's Leader, and top diplomat to hold Twitter accounts violates an executive order by US President Donald Trump that prohibits Americans from providing goods and services to the Iranian statesmen.

"It is a sanctionable offense for 'any person' to have provided ... technological support for, or goods or services to persons designated pursuant to that EO," the senators wrote.

Twitter, they added, is aware of the accounts held by Ayatollah Khamenei and Zarif, and of their links to the Iranian government, but "continues to provide internet-based communications services."