There are no official casualty figures, but the US-based Human Rights Activists News Agency has estimated that more than 2,000 people have been killed, including protesters and members of the security forces.
Separately, Iran’s government has accused Washington of seeking to manufacture a pretext for military intervention.
In a post on X on Tuesday, Iran’s mission to the United Nations said US policy towards Iran was rooted in regime change.
“Sanctions, threats, engineered unrest, and chaos serve as the modus operandi to manufacture a pretext for military intervention,” the statement said.
The mission added that Washington’s “playbook” would “fail again.”
The comments came after US President Donald Trump threatened what he described as “strong action” in response to Iran’s crackdown on protests.