She wrote on an account she has used for some time, but it was not immediately possible to verify her location.
Iran's military said its air-defense forces unintentionally shot down the Boeing 737-800 airliner on January 8, killing all 176 people on board. There were no survivors. Videos posted online showed demonstrators running from police who used batons and teargas.
Videos from these protests appear to show security forces using live ammunition against demonstrators, something that Iran's government has denied.
President Trumptweeted his support for the protesters in both English and Farsi, saying: "To the leaders of Iran - DO NOT KILL YOUR PROTESTERS". "On the 40th anniversary of Iran's revolution a year ago, he condemned "#40YearsofFailure".
Tehran has acknowledged shooting down the Ukrainian jetliner by mistake on Wednesday, killing 176 people, hours after it had fired at U.S. bases to retaliate for the killing of Iran's most powerful military commander in a drone strike ordered by Trump.
Iranian public anger, rumbling for days as Iran repeatedly denied it was to blame for January 8's plane crash, erupted into protests on Saturday when the military admitted it. Demonstrators turned out again on January 12.
On Sunday night, protesters massed in Tehran's Azadi, or Freedom, Square. One video showed riot police gathered near Vali-e Asr Square.
"They are lying that our enemy is America, our enemy is right here", another group outside a Tehran university chanted. Two state TV hosts resigned in protest over the false reporting about what happened to Flight 752.
Officers had been given orders to "show restraint", the chief of police said.
Iranian Government spokesman Ali Rebiei denied that his country was responsible, calling the allegation a lie and a psychological operation by the U.S.
"Actually, I couldn't care less if they negotiate".
Their handling of the matter saw a memorial gathering by students at a Tehran university turn into a demonstration on Saturday evening before it was dispersed by police.
The spokesman said all details provided by officials before Saturday's revelation had been based on the information they had. Hajizadeh said that a jammed communication line resulted in the decision that led to the shooting down of the plane. It denies seeking nuclear arms.
But other than in the case of the United States embassy in Baghdad, Esper would not confirm Trump's claim in a recent Fox News television interview that four U.S. embassies in the region were among Soleimani's target. The attack was revenge for the the killing of Iranian General Qasem Soleimani by a USA drone strike which escalated tensions in the region between Washington and Tehran.
The plane crashed Wednesday after it was struck by a surface-to-air missile launched by Iran's Islamic Revolutionary Guard Corps, an action Iran has blamed on "human error".
Ukrainian International Airlines Flight PS752 was also carrying 82 Iranians, 11 Ukrainians, 10 Swedes, 10 Afghans, three Germans, and three Britons.
The aerospace commander of Iran's Revolutionary Guards accepted full responsibility. Esper replied: "The president has drawn no preconditions other than to say we're willing to meet with the Iranian government".
Protests in sympathy to the victims were also held in front of the German Federal Foreign Office in Berlin.
The team includes consular officials and two members of Canada's Transportation Safety Board (TSB).