<span style="color: #222222;">Ukraine today asked Iran to hand over the black box flight recorders of the passenger plane that crashed after being hit by an Iranian missile. </span><br />'' <br />'' <span style="color: #222222;">The Office of the General Prosecutor said it it will take all measures to properly decode the black boxes and preserve evidence in the investigation of the accident.</span><br />'' <span style="color: #222222;"><br />'' In a statement, prosecutor's office said the country had sent a request for legal assistance linked to handover to the Ukrainian law enforcement agencies of the Ukraine International Airlines Boeing 737 flight recorders. </span><br />'' <br />'' <span style="color: #222222;">The statement added that Ukraine's SBU security service is in charge of investigating the crash of the plane which had been bound for Kiev. </span><br />'' <br />'' <span style="color: #222222;">The downing of the plane came hours after Tehran had launched a barrage of missiles at bases housing American troops in Iraq, in retaliation for the killing of commander Qasem Soleimani in a US strike.</span><br />''