Shannon Holmes called police from a convenience store on Tillman at Broad shortly after 6:30.
The passenger side window of the van he drives for AirMasters Air Conditioning & Heating was shattered. Police said late Thursday that they weren't sure what hit the window.
Holmes was not injured.
Police were still investigating late Thursday to determine if it was related to a string of 11 shootings on Sam Cooper since August.
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Earlier in the day, another report surfaced of a motorist's car being shot at.
In that case, a man was driving a Chevrolet Cheyenne Aug. 18 when a bullet shattered his window. The police report does not say what time of day the vehicle was hit.
He later found the bullet in the cabin of his car and it has been sent to the Tennessee Bureau of Investigation lab for ballistics tests. At least one other bullet has been recovered from another shooting.