A car exploded in Balashikha, a city in the Russian region of Moscow, killing a senior Russian general.
A Telegram post by the Russian Investigative Committee said: "A criminal case has been opened in connection with the explosion of a car in the city of Balashikha in the Moscow Region.
"Investigators from the Investigative Committee of Russia, forensic experts and experts from the department, as well as operational units of law enforcement agencies have left for the scene."
Russian media outlet SHOT, also posting on Telegram, said: "The deceased deputy head of the Main Intelligence Directorate of the General Staff of the Russian Armed Forces, Yaroslav Moskalik, was passing by the exploded Volkswagen Golf at the time of the explosion.
"Immediately after that, his body was thrown several meters away. Preliminary, the car filled with explosives could have been specially driven to the house where the soldier lived.
"According to SHOT, the IED was filled with striking elements with a diameter of about 6 mm. The car did not belong to him."
Pictures circulating online appeared to show the aftermath of the exoplosion.
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