The shootdown came just after Iran launched ballistic missiles at US military bases in Iraq, bringing Washington and Tehran to the brink of all-out war.
"The reality is there have been significant tensions in that region for a long time and what we are calling for now is a de-escalation to ensure there are no more tragic accidents or loses", he said.
Another video shared on social media showed protesters dragging away injured protesters dripping blood all over the pavement believed to be located around Azadi square in Tehran.
"The Iranian government is at a crossroads moment".
The demonstrations mark yet another crisis for Iran's leaders, who have been blamed for a weakening economy even as they cope with the Trump administration's targeted killing of a top general, Qassem Suleimani, in Iraq.
After initially blaming the crash on a technical failure, authorities finally admitted to accidentally shooting the plane down in the face of mounting evidence and accusations by Western leaders. Aggrieved Iranians are hitting the streets of Tehran for the second day amid growing public outcry over the government's actions.
More protests were expected later on Sunday, amid building outrage among some Iranians about the downing of the Ukrainian jet.
"To the leaders of Iran - DO NOT KILL YOUR PROTESTERS". Hezbollah is a key Iranian ally. The strike caused no casualties. On Sunday he demanded that Tehran "stop the killing of your great Iranian people".
"We are following your protests closely".
The crowds of mourners showed "the colossal unity of the Iranians against the Americans".
But other than in the case of the USA embassy in Baghdad, Esper would not confirm Trump's claim in a recent Fox News television interview that four United States embassies in the region were among Soleimani's target. Despite the fact that top officials repeatedly said that it was "impossible" for the IRGC to have shot down the aircraft, the secretary of Iran's top national security body, Ali Shamkhani, claimed that leaders never meant to cover up the disaster.
Araghchi said when police informed him that a man was arrested who claimed to be the British ambassador, he didn't believe them.
"Our diplomatic officials are already working on all tools available in the global legal field to obtain compensation from the Iranian side".
The majority of those on the Boeing 737, which slammed into a field shortly after take-off from Tehran, were Iranians and Canadians, and many were students.
"The government of Iran must allow human rights groups to monitor and report facts from the ground on the ongoing protests by the Iranian people".
Former US National Security Advisor John Bolton - a notorious American arch-hawk and a big fan of the idea of launching a war against Iran - was much blunter in his words, openly stating that "regime change is in the air" and "the people of Iran can see it".
It happened shortly after Iran launched missiles at two airbases housing U.S. forces in Iraq.
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