"The people of Iran are crying out for freedom," Haley said at a news conference. "All freedom-loving people must stand with their cause."
She said the United States would be seeking emergency sessions of the UN Security Council and the Geneva-based UN Human Rights Commission in the coming days.
Haley rejected as "complete nonsense" charges by Iran's supreme leader Ayatollah Ali Khamenei that the five-day-old protests were being fomented by the country's "enemies."
"If the Iranian dictatorship's history is any guide, we can expect more outrageous abuses in the days to come," she said.
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