"The killing of peaceful demonstrators must stop, and the labelling of protesters as ‘terrorists’ to justify violence against them is unacceptable," U.N. High Commissioner for Human Rights Volker Türk said in a statement Tuesday.
The U.S. Virtual Embassy Iran issued a warning earlier today telling American citizens who are still in the country to leave immediately.
President Donald Trump later urged the people of Iran to "take over" the country's institutions, saying he has canceled all meetings with the Iranian regime until its crackdown on unrest ends.
Trump made the announcement on social media, vowing that those responsible for killing anti-regime demonstrators will "pay a big price." Iran had previously claimed it was in contact with U.S. officials amid the protests.
"Iranian Patriots, KEEP PROTESTING - TAKE OVER YOUR INSTITUTIONS!" Trump wrote on Truth Social. "Save the names of the killers and abusers. They will pay a big price."
"I have canceled all meetings with Iranian Officials until the senseless killing of protesters STOPS. HELP IS ON ITS WAY," he added.
Fox News’ Anders Hagstrom, Efrat Lachter and The Associated Press contributed to this report.