Four men were killed and at least 19 other people, including a 16-year-old boy, were wounded in overnight shootings across the city, according to police.



Police responded to the violence on a steamy night punctuated by the constant calls of illegal fireworks. One of the shootings occurred in Washington Park on the South Side where hundreds of families were celebrating the July 4th holiday.



The first homicide of the night occurred around 11:20 p.m. Wednesday. Antonio D. Givan, 35, was shot in the head during an attempted hold-up in the 100 block of East 68th Street, about two blocks east of the Dan Ryan Expressway, police said.



Given lived in the the 6900 block of South Emerald Avenue, according to the Cook County medical examiner's office.



Around the same time, police found Korey Parker, 27, dead from apparent gunshot wounds to the head and chest in the 1500 block of West 78th Street in the Gresham neighborhood, authorities said. Parker, of the 7800 block of South Laflin Street, was pronounced dead at 3:55 a.m.



Just after 2 a.m., Anthony Suarez was riding in a car in the 1800 block of West 45th Street when another car pulled alongside and someone inside opened fire.



Suarez, 27, was struck in the chest and was taken to Stroger Hospital, where he was pronounced dead, authorities said.



At about 3:40 a.m., an 18-year-old man was shot in the chest in the 4800 block of West St. Paul Avenue in the North Austin neighborhood. He was dead at the scene, police said. His identity wasn't immediately released.



In other shootings:



• A 26-year-old man suffered a graze wound to the head as he walked with a group of people through Ogden Park in the 6500 block of South Racine Avenue just before 4 a.m., police said. He was taken to Provident Hospital in good condition.



• Three men were shot as they walked down the street in the 1300 block of South Millard Avenue just before 3 a.m., police said. All three were taken to hospitals with minor wounds, police said.



• A 21-year-old man suffered a minor wound about 2:12 a.m. in the 3900 block of West Augusta Boulevard. He was treated at a hospital and released.



• Two men were shot as they stood on a sidewalk in the 4200 block of South Wells Street at about 1:50 a.m. A 23-year-old man was listed in good condition with a gunshot wound to the thighs. A 20-year-old man was stable at Mercy Hospital and Medical Center.



• A 16-year-old boy was shot in the right calf and thigh in the 3600 block of South Wolcott Avenue as he stood on a sidewalk at about 1:45 a.m. He was taken to Stroger Hospital in good condition. Police say they are looking for two suspects.



• A woman was struck in the thigh in the 2800 block of South Christiana Avenue in the Little Village neighborhood at 1:40 a.m. Her condition wasn't immediately known, police said.



• A 23-year-old man was shot in the forearm as he drove in the 2700 block of North Hoyne Avenue at about 1 a.m., police said. He was taken to Advocate Illinois Masonic Medical Center in good condition.



• An 18-year-old man was shot in the right ankle as he stood with a group of people in the 6200 block of South Wood Street at about 12:50 a.m. He was taken to Christ Medical Center in good condition.



• A gunman standing in a gangway shot three men on a sidewalk in the 3500 block of West 38th Place in the Brighton Park neighborhood at about 12:10 a.m. Thursday, police said. All three were taken to Mount Sinai Hospital.



An 18-year-old man was listed in critical condition with a wound to the chest, while doctors stabilized a 22-year-old man who was struck in the lower back. A 23-year-old man wounded in his left hand and right thigh was listed in good condition.



• A man in his 20s was shot in the buttocks in the 7500 block of South Union Avenue just before midnight, police said. He was taken to Advocate Christ Medical Center in Oak Lawn.



• A 25-year-old man was standing on a sidewalk in the 7200 block of South Morgan Street at about 11:20 p.m. when he was shot, police said. It was unclear whether the man was targeted or hit by a stray bullet. The man was treated for the minor wound and listed in good condition, police said.



• A man in his 40s was found shot in the head in the 700 block of West 71st Street in the Englewood neighborhood at 10:50 p.m., police said. He was taken to Stroger Hospital in critical condition.



• At 11:57 p.m., a 19-year-old man was shot in the back when someone opened fire from a passing sedan in the 13200 block of South Forrestville Avenue in the Golden Gate neighborhood on the Far South Side. He was taken to Advocate Christ Medical Center, where his condition was stabilized, police said. The shooting is believed to be gang-related.



• A 32-year-old man was shot in the abdomen about 9:30 p.m. in Washington Park in the 5500 block of South Cottage Grove Avenue, where hundreds of families were celebrating the holiday, police said. The man was taken to Stroger in serious condition, police said.



No arrests had been made in any of the shootings, police said.