Joint investigation into the killing of a Turkish soldier on the border with Iran The Ministry of Defense of Turkey announced today that an investigation is underway in cooperation with the Iranian authorities to clarify the dimensions of the shooting incident on the border of the two countries and the death of a Turkish soldier. This office announced that the infantry soldier "Yosef Sait Onlu" was killed by gunfire on October 31 (Na Aban), while confronting the illegal border crossing in the area of responsibility of the "Angin Mayen" border post. Go to tab.ir.