Iran imposed sanctions on British institutions and people on Wednesday after the UK blacklisted the country's morality police amid protests over the death of Mahsa Amini, the Foreign Ministry said.
Britain's National Cyber Security Centre and the Government Communications Headquarters, known as the GCHQ, are among the seven institutions listed.
Tehran said their actions "led to riots, violence and terrorist acts against the Iranian nation".
Iran has been rocked by protests since Amini, 22, died on September 16, three days after she was arrested by "morality police" in Tehran for allegedly breaching the country's strict dress code for women.
The street violence has led to dozens of deaths, mostly among protesters but also among the security troops, and hundreds of demonstrators have been arrested.
The 16 organisations and people were under sanctions for "their deliberate actions in supporting terrorism and terrorist groups, promoting and inciting terrorism, spreading violence and hatred, and violating human rights", Iran's Foreign Ministry said.
Protests rage on the streets of Tehran - in pictures
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A motorcycle on fire in Iran capital Tehran. Iran has been torn by the biggest wave of social unrest in almost three years, which has seen protesters, including university students and even young schoolgirls chant "Woman, Life, Freedom". All photos by AFP -
People gather next to a burning motorcycle. -
Iranian police patrol the streets. -
More objects on fire in Tehran. -
Motorcyclists pass a burning rubbish bin. -
The protests began on September 17 at the funeral in Saqez of Mahsa Amini, 22. -
Amini was arrested for wearing “inappropriate attire”. -
They have turned into the biggest challenge to Iran’s clerical leaders in years, with protesters calling for the downfall of supreme leader Ayatollah Ali Khamenei.
BBC Persian and Iran International, two Farsi-speaking channels based in the UK and considered "hostile" by Tehran, were also blacklisted.
The nine people listed include Conservative members of Parliament Thomas Tugendhat, Minister of State for Security, and Bob Blackman.
Sanctions include a visa ban and the seizure of any "property and assets" in Iran.
Alternative Mahsa Amini protests - in pictures
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Swedish-Iranian director Ali Abbasi shows his support for the protests against Iran as he attends the UK premiere of his film, 'Holy Spider', at the 66th BFI London Film Festival. The protests were sparked by the death of a young woman, Mahsa Amini, in police custody in Iran. Getty -
A mural in Milan, Italy, shows Marge Simpson, a character in the animated sitcom 'The Simpsons', cutting her hair in protest over the death of Amini. EPA -
Actress Juliette Binoche cuts her hair as a part of the protest against Iran. Reuters -
Protester hold up placards in Rome as they denounce the Iranian government after Amini's death. AFP -
Actress Marion Cotillard cuts her hair as a part of the protests. Reuters -
People hold up a placard bearing a picture of Amini during a demonstration in solidarity with the Iranian people, near the European Parliament in Strasbourg, France. EPA -
Iranian-born actress Nazanin Boniadi addresses demonstrators at a rally held in support of Iranian women, outside City Hall in Los Angeles, California. Reuters -
An Iranian woman living in Turkey takes part in a protest near the Iranian consulate in Istanbul, Turkey. Reuters -
A demonstrator holds cut hair during a protest near the Iranian consulate in Istanbul. Reuters -
Protesters hold up placards in Rome during a demonstration in solidarity with Iranian women. AFP
The US, Britain and Canada have already announced sanctions against Iran over rights breaches.
The UK penalised the morality police and security officials on October 10.
The EU on Monday imposed sanctions on 11 Iranian people and four entities for the way in which they dealt with the month-long demonstrations.
