The United States has imposed sanctions on Iran's Minister of Communications and Information Technology Mohammad Javad Azri-Jahromi for restricting Internet access during recent protests.
The Treasury said in a statement on Friday that the sanctions prevent the Iranian minister from disposing of his property under US jurisdiction.
She added that US regulations generally prohibit transactions by American people or those passing through the United States in such property.
The statement accused the Iranian minister of responsibility for the development of a policy of repressive censorship on the Internet since taking office two years ago.
Commenting on the resolution, US Secretary of State Mike Pompeo said the United States held Iranian officials responsible for cracking down on demonstrators.
Pompeo said that the Iranian Minister of Communications and Information Technology helped to close the Internet to the Iranian people.
He said Washington supports free access to information, freedom of expression and peaceful assembly. It would continue to strengthen accountability to those who unjustifiably restricted those freedoms.
He said the Iranian regime would seek to protect the aggressors of the Iranian people and obliterate their terrible acts from memory, while the United States would "reveal these human rights abusers and record their shameful actions."
Pompeo renewed what he called his country's standing with the Iranian people in their struggle "against a repressive regime that works to silence them and launch a campaign of arrests and killings against demonstrators."
Comment by the Minister
"I am not the only member of the Sanctions Club (on the basis of Trump's superstition)," he said in a tweet.
Azeri Jahrami said in interviews with local media that blocking the network was important for security reasons.
Earlier, Iranian media said Iran's National Security Council had agreed to gradually reactivate the network in some areas.
Iran has recently seen angry protests against rising fuel prices, leading to deaths and many arrests on charges of provoking riots, threatening stability and implementing foreign agendas.