A 1-year-old boy and a 29-year-old man were critically injured in a South Shore residential fire Saturday night, Chicago police said.Officers and Chicago firefighters responded to the accidental fire around 6:30 p.m. in the 6800 block of South Merrill Avenue, according to police.Three people were in jured. The 1-year-old was taken to Comer Children's Hospital; the man in critical condition and a 26-year-old woman who suffered minor burns were both taken to University of Chicago Medical Center, police said.The Chicago Fire Department is investigating the cause of the fire. ...read more read less