Britain announced sanctions Friday against 30 people worldwide, including Iranian officials, for serious rights violations, such as the violence on protesters.
The move came a day after France announced plans for new European Union sanctions against Iran over human rights abuses in its security crackdown on popular unrest there as well as its supply of drones to Russia before Moscow's invasion of Ukraine. The proposed sanctions will be taken up by the EU early next week.
Iran executed the first detained protester December 8 after a sham trial, sparking worldwide outrage and condemnations. The execution is seen as part of a government strategy to intimidate ordinary people and activists from pursuing the almost three-month-old antigovernment protests movement.
Canada also announced fresh sanctions against Iranian officials December 9, in what appears to be coordinated actions by Western governments.
The British government said its sanctions were coordinated with international partners to mark International Anti-Corruption Day and Global Human Rights Day. They encompassed individuals involved in activities including the torture of prisoners and the mobilization of troops to rape civilians.
"Today our sanctions go further to expose those behind the heinous violations of our most fundamental rights," Foreign Secretary James Cleverly said in a statement.
Britain sanctioned 10 Iranian officials connected to Iran's prison systems. This included six people linked to the Revolutionary Courts that have been responsible for prosecuting protesters with sentences including the death penalty.
Nationwide protests that erupted after the death in police custody of 22-year-old Kurdish Iranian woman Mahsa Amini on September 16 have posed one of the biggest challenges to the Islamic Republic since its establishment in 1979.
The British government sanctioned Ali Cheharmahali and Gholamreza Ziyayi, former directors of Evin prison in Tehran, which it said was a facility notorious for the mistreatment of both Iranian and foreign detainees. Evin houses many political prisoners, where torture and forces confessions are conducted.
The foreign office said the sanctions against 11 countries across seven sanctions regimes were the most that Britain has ever imposed in one package.
Britain also sanctioned figures involved in Myanmar's military, which it said were involved in committing massacres, torture and rape.
Among those sanctioned by Britain were Myanmar's Office of the Chief of Military and Security Affairs, which it said had been involved in torture since last year's military coup, including rape and sexual violence.
Those sanctioned also include Russian Colonel Ramil Rakhmatulovich Ibatullin for his role as the commander of the 90th Tank Division, which has been involved in fighting since Russia's invasion of Ukraine earlier this year.
The government said there have been multiple allegations made against serving members of the 90th Tank Division, including the conviction in Ukraine of a senior lieutenant on sexual abuse charges during the conflict.
Russia, which has said it is conducting a "special military operation" in Ukraine to eliminate threats to its security, has denied committing war crimes or targeting civilians.
But extensive evidence has existed since the beginning of the conflict attesting to large-scale human rights violations that some believe constitute war crimes.
With reporting by Reuters