In Antioch, police reported finding over 50 bullet casings following what appeared to be a drive-by shooting. The Antioch Police Department responded to multiple 911 calls just after 6:35 p.m. with reports of gunfire in the vicinity of the 1000 block of St. Frances Drive near Contra Loma Boulevard. CBS News San Francisco reported that authorities arrived to discover at least 53 expended shell casings at the scene.