The US Deputy Special Envoy for Iran expressed concern that the morality police are again cracking down to enforce mandatory hijab.

"It seems the regime has learned nothing from the protests. Women and girls everywhere should be allowed to wear whatever they want," tweeted Abram Paley on Monday.

The office of the US Special Envoy for Iran showed its first signs of life following days of media storm about circumstances surrounding the former envoy’s dismissal on Friday.

The official twitter account of the mission said: “The Office of the Special Envoy for Iran and the entire team at the State Department remain engaged in implementing our policy on Iran.” The account had been inactive since early June, about a month before Rob Malley’s suspension was announced.

The ‘morality’ police in Iran have returned to the streets of Tehran and other cities ahead of the first anniversary of Mahsa Amini's death in police custody last September, which triggered mass unrest in its wake.

A video which went viral on Saturday showed Tehran's morality police arresting a teenage girl without compulsory hijab in the Gisha neighborhood.