At least 29 people were killed when a Russian An-26 military transport plane crashed into a cliff in Crimea.Russia’s Defense Ministry said the accident was probably caused by a technical failure. According to Reuters, the plane was on a planned flight when contact was lost around 6 pm local time on Tuesday.A search team later located the crash site. Officials said all six crew members and 23 passengers on board were killed, with no reports of survivors.The ministry said there was no sign of any external impact on the plane, suggesting that factors such as missiles, drones or bird strikes were not involved.A military commission has been sent to investigate the causes of the accident.“There was no impact on the aircraft. The preliminary cause of the accident is a technical fault. An army commission is working at the scene,” the ministry said in a statement.The An-26, a light tactical transport aircraft introduced in the late 1960s, has been widely used for both military and civilian purposes.However, it has been involved in several fatalities in recent years, including crashes in Ukraine, South Sudan and Ivory Coast.