( CNN ) -- Three people were shot to death in Chicago on Friday and Saturday , one week after a spate of Fourth of July violence left nine dead in the city . Chicago Police Department News Affairs Officer Veejay Zala said the most recent death occurred when a man , 28 , was shot in the back on West Devon Avenue about 3:20 p.m. Saturday . Police said he was standing on the street when an unknown person killed him . That killing may be gang-related , Zala said . On Friday , a 27-year-old man was killed and a woman wounded in domestic violence on South Rockwell Street , he said . Also Friday , a man , 32 , was killed on West Quincy Street in a possible drive-by shooting , Zala said . Over the Fourth of July weekend , nine people were killed and more than 60 wounded , police said . Chicago Police Superintendent Garry McCarthy said in eight incidents , police fired guns at suspects or were fired upon . In two incidents , police shot and killed the suspects , both of whom were 16 , he said . McCarthy said lax state and federal gun laws played a part in the high rate of violence .
Two men shot to death Friday , one on Saturday afternoon . Nine killed , 60 wounded over Fourth of July weekend . Police superintendent blames lax state and federal gun laws .