At about 3 p.m., deputies received a report that shots had been fired in the 200 block of Willow Avenue, sheriff's Sgt. Ray Kelly said.
Deputies who responded to the shooting found a man on the ground suffering from gunshot wounds and he was pronounced dead at the scene, Kelly said.
Investigators are canvassing the area to gather information about the shooting and residents are advised to avoid the area, he said.
Officials said the child was unharmed.
He said there's no suspect information being released at this time.
Kelly said anyone who has information about the shooting should call the sheriff's office at (510) 667-7721.