State Department spokeswoman Heather Nauert had suggested the U.S. government could impose sanctions against Iranian officials who repress peaceful protests.
The United Nations Security Council began meeting Friday afternoon to address anti-government protests in Iran.
A U.N. Security Council emergency meeting on the protests roiling Iran is putting Tehran on notice that "the world will be watching" what it does, the US ambassador said Friday.
At least 21 people have been killed amid the anti-government rallies and unrest that began last week.
"This is a matter of fundamental human rights for the Iranian people, but it is also a matter of worldwide peace and security", said Haley.
"The United States has spoken clearly and unequivocally", Vice President Mike Pence wrote in a Washington Post op-ed Wednesday.
In contrast to the USA response to the Iran protests in 2009, where the Obama administration took a relatively hands-off approach, President Trump has promised "great support" for the demonstrators, while the State Department has hinted at sanctions for officials who abuse protesters and said that it will use Facebook and Twitter to communicate directly with activists. "The Iranian regime is now on notice, the world will be watching what you do".
"However worrying the events of the last few days in Iran may be, they do not constitute per se a threat to worldwide peace and security".
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Russian Federation warned the United States against intervening in Iran and exploiting the situation there to undermine the agreement on Tehran's nuclear program. The US delegation said on Thursday it had requested the Friday meeting.
Iran's prosecutor general, Mohammad Jafar Montazeri, alleged Thursday that an American CIA official was the "main designer" of the demonstrations.
"And let there be no doubt whatsoever, the United States stands unapologetically with those in Iran who seek freedom for themselves, prosperity for their families and dignity for their nation", she added.
Trump's administration has denied having any hand in the demonstrations, saying they arose completely spontaneously.
"They are acting of their own will, on their own behalf, for their own future".
While the U.S. and its European partners - including the United Kingdom, France and Germany - all fundamentally support the right of Iranian demonstrators to peacefully protest, they disagree in their analysis of where the situation on the ground is headed and over the strategic value of ramping up the rhetoric publicly, sources have told CNN. He also has described Iran as "failing at every level" and declared it is "TIME FOR CHANGE!" "The people of Iran are crying out for freedom".
Presidential Spokesperson İbrahim Kalın said such actions could provoke a backlash, after six days of anti-government protests in Iran.