Iran is no longer sharing evidence from the investigation into the Ukraine airliner crash with Ukraine after audio from the investigation was leaked by Ukrainian media, the director in charge of accident investigations at Iran's Civil Aviation Organization was quoted as saying on Monday. The audio file was part of the evidence that was given to Ukrainian experts as part of the joint investigative team's examination of the crash. "The technical investigation team of the Ukrainian airline crash, in a strange move, published the secret audio file of the communications of a pilot of a plane that was flying at the same time as the Ukrainian plane," Hassan Rezaifar said, according to the semi-official Mehr news agency. "This action by the Ukrainians led to us not sharing any more evidence with them." The leaked recording showed an exchange between an Iranian air-traffic controller and an Iranian pilot purports to show that authorities immediately knew a missile had downed a Ukrainian jetliner after takeoff from Tehran, killing all 176 people aboard, despite days of denials by the Islamic Republic. Ukraine's President Volodymyr Zelenskiy acknowledged the recording's authenticity in a report aired by a Ukrainian television channel on Sunday night. After the Jan. 8 disaster, Iran's civilian government maintained for days that it didn't know the country's paramilitary Revolutionary Guard, answerable only to Supreme Leader Ayatollah Ali Khamenei, had shot down the aircraft. The downing of the jetliner came just hours after the Guard launched a ballistic missile attack on Iraqi bases housing U.S. forces in retaliation for an earlier American drone strike that killed the Guard's top general, Qassem Soleimani, in Baghdad. A transcript of the recording, published by Ukrainian 1+1 TV channel, contains a conversation in Farsi between an air-traffic controller and a pilot reportedly flying a Fokker 100 jet for Iran's Aseman Airlines from Iran's southern city of Shiraz to Tehran. "A series of lights like ... yes, it is a missile, is there something?" the pilot calls out to the controller. "No, how many miles? Where?" the controller asks. The pilot responds that he saw the light by the Payam airport, near where the Guard's Tor M-1 anti-aircraft missile was launched from. The controller says nothing has been reported to them, but the pilot remains insistent. "It is the light of a missile," the pilot says. "Don't you see anything anymore?" the controller asks. The control tower can be heard trying and failing to raise the Ukrainian airliner on the radio. The pilot of the Iranian plane then says he has seen "an explosion. In a very big way, we saw it. I really dont know what it was." The controller then tries to contract the Ukrainian jetliner, but unsuccessfully. In a television interview, Mr Zelenskiy said the leaked audio "proves that the Iranian side knew from the start that our plane had been hit by a missile". "He says that 'it seems to me that a missile is flying', he says it in both Persian and English, everything is fixed there," Mr Zelenskiy said.