"On Iran, they discussed the tragic loss of life on the Ukraine International Airlines passenger jet".
A Ukrainian delegation arrived in Tehran to help in investigations into the incident.
However, one can not deny that the accident has caused great grief to the Iranian nation and to the bereaved families of the victims, the spokesman said, adding that the failure to release the information about the incident in a timely manner has damaged the public trust.
"Ukrainian specialists are continuing to look for material evidence linked with the tragedy", Honcharuk said.
Iran's Tasnim News Agency, which is also close to the country's conservatives, said the envoy had been "provoking radical acts" among students.
Sentiments first boiled over late Saturday, shortly after the Revolutionary Guard admitted to shooting the plane down by mistake.
Canadian Prime Minister Justin Trudeau told a memorial service for the 57 Canadian victims that their country "will not rest until we get the accountability, justice, and closure that the families deserve".
The Trump administration has argued that Soleimani was planning attacks against US interests and personnel, although conflicting claims have emerged from the president and his officials as to the intelligence surrounding these alleged operations. "No one, including the country's President Hassan Rouhani, knew the cause of the plane's crash before January 10".
Rebiei stated that technical investigations were carried out regularly and quickly upon the instruction of President Rouhani, and that results would be announced as soon as the probes are completed.
Although Iranian authorities quickly called for an investigation and invited representatives from Ukraine, Canada, Boeing and other relevant players, Civil Aviation Organization of Iran Chief Ali Abedzadeh dismissed growing speculation that anti-aircraft fire may have been involved.
Iranian media said ambassador Rob Macaire was arrested outside a university and detained for more than an hour before being released. Two state TV hosts resigned in protest over the false reporting about the cause of the plane crash. Information obtained from the USA will assist in the investigation. Iran says it will not negotiate as long as United States sanctions are in place.
As the controversy continued, more airline companies stopped flights to Tehran.
General Salami, the current commander of the IRGC, officially apologized to the people of Iran and said that the government had not been informed that the plane was shot down until Friday evening.
Iran admitted over the weekend that one of its own missiles took down the Boeing 737-800, but called it a terrible mistake. The Guard answers directly to Supreme Leader Ayatollah Ali Khamenei.
There's also been grief and anger from Iran's creative community. "I can tell you that they are damaged", said Fox. He said when he learned about the downing of the plane, "I wished I was dead".
"My sister was a wonderful, smart, unbelievable person", she said.
"Even talking about it makes my heart beat faster and makes me sad", said Zahra Razeghi, a Tehran resident not taking part in demonstrations who spoke earlier Sunday to the AP.
He said that despite Iran's national team qualifying for the 2020 Tokyo Olympics after years of effort, "there is no energy left in our sad and desperate souls to celebrate".