At the 46th session of the UN Human Rights Council on March 9, Ukraine joined the statement by the United Kingdom, Canada, and Sweden on the PS752 downing by Iran.

That's according to the Ministry of Foreign Affairs of Ukraine.

"It is just over a year since the tragic downing of Ukraine International Airlines flight 752. That crash, caused by two Iranian surface-to-air missiles, killed 176 people – many of whom were traveling home for the holidays or returning to school. We continue to mourn this devastating loss," the statement reads.

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In February, Special Rapporteurs Agnes Callamard and Javaid Rehman released a letter sent to the government of Iran, which outlined a number of very serious allegations.

"Chief amongst their concerns is that the right to life of the 176 passengers and crew members was violated. It is our understanding that Iran has not responded to this letter. Iran’s alleged violation of these human rights obligations is extremely troubling. This is compounded by allegations of entirely unacceptable harassment and threats made against family members of some of the victims," reads the statement.

Read alsoPS752 downing: Iran violated multiple human rights obligations, UN experts sayThe signatories call on Iran to reply to the letter as soon as possible and certainly in advance of the Interactive Dialogue with Special Rapporteur Callamard at HRC47; immediately stop any harassment and intimidation of the victims’ families, both in Iran and elsewhere; ensure a full and transparent criminal investigation and impartial judicial proceedings as part of their obligation to provide justice for the victims of this tragedy, and provide a comprehensive account of the events that led to this tragedy.

PS752 downing: Background

On January 8, 2020, Kyiv-bound Boeing 737 passenger jet flight PS752, operated by Ukraine International Airlines, crashed in Iran shortly after takeoff from Tehran Airport.

All 176 people on board, including 11 Ukrainian nationals – nine crew and two passengers – were killed. Among victims are also citizens of Iran, Canada, Sweden, Afghanistan, Germany, and the UK.

Iranian President Hassan Rouhani admitted that the Ukrainian liner had been shot down as a result of an unintentional "human error," and promised to bring those responsible to justice.

On June 9, media reports said Iran had accused six persons in the PS752 downing case.

On July 20, the flight recorders were delivered to Paris and decrypted on July 21.

On July 24, it was reported that data from the black boxes had confirmed external interference with the aircraft's operation.

On October 23, Ukrainian Deputy Foreign Minister Yevhen Yenin said Iran would pay compensation to the relatives of victims of the UIA flight PS752 crash, but the process might last up to two years.

On December 9, however, Yenin said that Iran had withdrawn the offer to handle the payments to the families of those killed in the UIA plane crash.

In the middle of December, Canada expressed its position on the Iranian investigation into the downing of the Ukrainian plane, saying it is not credible.

On December 22, the Iranian news agency Tasnim reported that Iranian investigators, during a video conference, had provided representatives of other countries whose citizens were victims of the crash with a technical report on the UIA downing.

On December 23, Yenin said Ukraine had not received the report.

On December 24, Foreign Minister Dmytro Kuleba expressed concern that Iran was delaying the negotiation process on the case of the downed Ukraine International Airlines plane. He noted that Ukraine had not received a technical report from Iran on the plane downed almost a year ago.

On December 30, Iranian cabinet members reportedly agreed at a session to allocate US$150,000 or its equivalent in euros to each family of the victims of the Ukrainian plane crash in January 2020.

On January 7, 2021, Rouhani said all those responsible for the downing of the plane would be brought to justice.

The Canadian government and security agencies are reviewing an audio recording in which a man – identified by sources as Iran's foreign affairs minister – discusses the possibility that the destruction of flight PS752 was an intentional act.

On Iranian Military Prosecutor's Office has completed a pre-trial investigation into the incident, Iranian media reported February 21.