CHICAGO (WLS) -- Six people were shot, one fatally, after a holiday party turned violent in the South Chicago neighborhood Saturday morning, police said.Police and SWAT units responded to the 8800-block of South Exchange Avenue at about 2:30 a.m., police said. Witnesses said they saw people jumping from an upstairs window to escape the gunfire.A 20-year-old man was pronounced dead at the scene, police said. Another 20-year-old was transported to Northwestern Memorial Hospital in critical condition with a wound to the groin. A 25-year-old woman and three other men, ages, 23, 22 and 21, were wounded and hospitalized in stable condition."I don't know if it was a family gathering, but a good amount of people that was in here, some type of party, and an individual has come through and discharged his weapon," said community activist Andrew Holmes.Police are investigating. No one is in custody.