Lieutenant General Fanil Sarvarov of Russia was killed on Monday morning in Moscow due to an explosion.
Russia's Investigative Committee reported that an explosive device detonated beneath a car, causing Sarvarov's death.
Sarvarov was identified as the head of the armed forces' operational training department.
The Investigative Committee stated that one area of investigation includes the potential involvement of Ukrainian intelligence services. Ukraine has not issued a statement regarding the incident.