There are reports that a Russian military plane, which crashed last week, was shot down by friendly fire. Russia’s Interfax news agency says investigators believe another plane involved in exercises shot down the SU-25 jet.
Investigators say they didn't find any evidence the plane's systems had malfunctioned. The incident left the pilot dead. An investigation is being carried out by a commission from the Defence Ministry and Airforce Command. All SU-25 planes are now able to fly after they were grounded following the accident.