A Russian Mi-28 military helicopter crashed in the Kaluga region, southwest of Moscow, resulting in the death of its crew, according to Russia's Interfax news agency.
The Russian Ministry of Defense reported that a technical malfunction likely caused the crash.
Although the exact number of people on board was not disclosed, a Mi-28 helicopter typically has a two-person crew.
The incident underscores ongoing concerns about the safety and reliability of military aviation equipment.
The Mi-28, also known as the "Havoc," is an attack helicopter designed for all-weather operations.
The ministry is expected to conduct a thorough investigation to determine the precise cause of the crash and prevent future occurrences.