The Green Bay Police Department responded to a report of shots fired at around noon yesterday. The report indicated that the incident occurred at a residence in the 800 block of Elmore Street, but casings were found in the 500 block. Schools in the area were put on lock down as a precautionary measure. The investigation continues as officers and the forensic unit canvas the area and collect any and all evidence. In the initial stages of the investigation, officers believe that this is not a random act. But this disturbance was between groups of individuals that know each other.  Anyone with any information on the shooting is encouraged to contact the Green Bay Crime Stoppers at 432-7867.