NEW: A car bomb killed an unidentified Russian colonel, reportedly the chief navigator of the 6th Air Force and Air Defense Forces, in the Shushry settlement in St. Petersburg earlier today.
An explosive device strapped under his car detonated from afar on the Kolpinskoye road as he drove from a residential yard.
He died on the spot.
This is the second almost identical bombing under the vehicle of a senior Air Force/Air Defense officer in the same area in less than three months.