South San Francisco police responded to a call about shots fired around 4 p.m. in the 2400 block of Greendale Drive.
Police believe a male suspect fired a high-powered rifle or shotgun from a car toward the group of people, South San Francisco police Sgt. Joni Lee said.
The bullets struck a parked car and an occupied home, but no one was hit by the gunfire, police said.
The shooter was gone by the time police arrived but officers found three bullet casings at the scene, Lee said.
Police have not identified any suspects in the case, Lee said.
Anyone with information on the shooting is encouraged to call Officer Gablin at the South San Francisco Police Department at (650) 877-8900