"According to international regulations, representatives from the civil aviation agency of the country where the crash has taken place (Iran), the civil aviation agency of the country which has issued the airworthiness certificate (Ukraine), the owner of the airliner (Ukraine International Airlines), the aircraft manufacturer (Boeing Co.), and the jet engine manufacturer (CFM International) can participate in the investigation process. A delegate from Ukraine is already in Iran. We call upon Boeing Co. to dispatch its own representative to participate in the process of reading the black box data," the statement said.

"We also welcome the participation of all countries which have lost their nationals in the accident," the statement noted.

Rejecting the US's allegations that missiles downed the Ukrainian jet, the statement said: "No one will assume responsibility for such a big lie once it is known that the claim had been fraudulent."

"It is unfortunate that the psychological operation of the US government, and those supporting it knowingly and unknowingly, are adding insult to the injury of the bereaved families and victimizing them for certain goals by propagating such fallacies," it added. (ILKHA)