The sanctions targeted Interior Minister Ahmad Vahidi, Communications Minister Eisa Zarepour, and five senior security officials "for the shutdown of Iran's internet access and the continued violence against peaceful protesters," the US Treasury said.

Protests erupted across Iran over the death of Amini, a 22-year-old Kurd, after her arrest by the morality police in Tehran for allegedly breaching the Islamic republic's strict dress code for women.

The crackdown by the security forces on the protests has claimed dozens of lives, according to human rights groups.

"The rights to freedom of expression and of peaceful assembly are vital to guaranteeing individual liberty and dignity," said Treasury Under Secretary of the Treasury Brian Nelson in a statement.

"The United States condemns the Iranian government's Internet shutdown and continued violent suppression of peaceful protest and will not hesitate to target those who direct and support such actions."

The five security officials included in the sanctions were: Hossein Sajedinia, the deputy operations commander of Iranian law enforcement forces; Yadollah Javani, the deputy political commander of the Islamic Revolutionary Guard Corps; Vahid Mohammad Naser Majid, the head of the Iranian Cyber Police; Hossein Nejat, an IRGC commander; and Hossein Rahimi, who oversees much of the morality police's hijab enforcement in Tehran, according to the Treasury.

On September 22 the US Treasury placed sanctions on Iran's morality police after Amini's death.

Treasury sanctions aim to freeze any assets those designated might have under US jurisdiction and forbid any American individuals or companies -- including international banks with US operations -- from doing business with them, effectively limiting their access to global financial networks.