Fairfield Police want to know who opened fire on the Electrician's Union building Thursday night.
It happened around 5 p.m.
People were inside waiting for a class to begin when bullets came through the front window.
Seven bullet holes were found in the glass.
Police say they came from a 22-caliber.
And officers found casings on the ground near the building.
Anyone with information on the shooting is asked to call Fairfield Police at 453-9321.
Police Investigating Shooting in Fairfield