Two people were shot in the 4600 block of South St. Lawrence Avenue at about 2 a.m., police said. One of them, a 24-year-old man, reportedly had been arguing with someone who pulled out a gun and shot him in the chest. He was declared dead on the scene and later identified as Deandre Holiday of the 5100 block of South Indiana Avenue, according to the Cook County medical examiner's office.