Photos from the scene showed the mangled vehicle in the middle of a Kiev intersection. Police say the car's driver was killed immediately and two passers-by were slightly injured in this morning's blast.
The Defense Ministry identified the victim as Colonel Maxim Shapoval of the Chief Directorate of Intelligence.
Ukrainian media reported that Shapoval was chief of military intelligence's special forces.
Kiev regional police chief Andriy Kryshchenko tells 112 television channel the unidentified explosive device was either attached to the bottom of the car or planted inside.