The incident happened at the Greater Oaks Charter School on Delancey and Forsythe around 10 a.m.
Fortunately students were not inside the fourth-floor classroom at the time.
Police say a gunman missed his intended targets -- two men -- on the street and one of the rounds fired struck the school instead.
The two men got away in a dark-colored Mercedes Benz while the gunman ran away.
No injuries were reported.
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