Demonstrations in Iran turned violent Sunday as police appeared used live rounds of ammunition on protesters.
One video shows a crowd of protesters running away and another shows demonstrators coughing while escaping tear gas. Multiple outlets report at least one protester was injured.
Groups took to the streets in Tehran over the weekend after Iran said it mistakenly shot down a Ukrainian commercial airliner, killing all 176 people on board.
President Donald Trump responded to the violence in a tweet Sunday. He told Iranian officials to not kill protesters saying, "The World is watching. More importantly, the USA is watching. Turn your internet back on and let reporters roam free! Stop the killing of your great Iranian people!"
Tehran's police chief denied reports that his forces used live ammunition on protesters saying, "Police treated people who had gathered with patience and tolerance."
Additional reporting from Newsy affiliate CNN.