A car bomb killed a senior Russian military official in Moscow early Monday, according to a statement from Investigative Committee of Russia.

The victim was identified as Lt. Gen. Fanil Sarvarov, head of the Operational Training Department of the General Staff of the Russian armed forces. Investigators said an explosive device planted beneath a vehicle detonated on Yaseneva Street in Moscow, killing Sarvarov.

Authorities said a criminal case has been opened into the killing. The Investigative Committee said one of the lines of inquiry is whether the attack was organized by Ukrainian special services, though no evidence was cited to support the claim.

The committee released video footage from the scene showing a heavily damaged white vehicle in what appeared to be a residential area. Investigators said the probe remains ongoing.