Four men were killed overnight on Chicago's South and Southwest sides.A 52-year-old man was found inside a Chicago Lawn home Saturday around 8:30 p.m. suffering from "injuries to his body," Chicago police said. He was taken from the home in the 2400 block of West 61st Street to University of Chicago Medical Center where he was pronounced dead.Police are investigating his death as a homicide. No further details were reported.Just after midnight Sunday in Little Village, a man was found unresponsive in the 2700 block of South Karlov Avenue suffering from a gunshot wound to his shoulder, police said. He was taken to Mount Sinai Hospital, where he was later pronounced dead.In Greater Grand Crossing, a man was found shot around 1:25 a.m. in the 7600 block of South Cottage Grove, according to police. He was pronounced dead at University of Chicago.About an hour later in Woodlawn, officers found two men suffering from gunshot wounds in the 6600 block of South Champlain Avenue, according to police. One man was shot in his head, and the other was shot in his leg. Both were taken to University of Chicago where the man shot in his head was pronounced dead. The other man, 20 years old, was in fair condition, according to police.No arrests have been announced in any of the homicides. ...read more read less