Esmaili added that the interrogation of these individuals and the investigation are ongoing.
The spokesman added that the plane’s black box was sent to France by a team of experts from Iran and Ukraine.
Esmaili said that the issue will be further studied when the black box is read.
The Ukraine International Airlines’ Boeing 737-800 crashed in Tehran province on Jan. 8, killing all 176 people on board.
Iran's Armed Forces General Staff issued a statement on Jan. 11 saying that the aircraft was shot down by the Iranian Air Defense System.
Following the incident, airlines of several countries stopped flights to Iran.
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