At least 56 people were shot, 12 fatally, in Chicago in a spate of violence over the long Memorial Day weekend.

Among those injured was a 4-year-old girl, identified by family as Jacele Johnson, who was shot in the head while sitting inside a car outside of a prom party Friday evening. The incident happened at about 8 p.m. near West 70th and South Justine streets in the West Englewood neighborhood.

Jacele was taken to University of Chicago Medicine Comer Children's Hospital where she underwent surgery for the gunshot wound, her mother told NBC Chicago. As of Monday morning, the young girl's condition was upgraded from serious to fair, a hospital spokesperson said.

Two other children were also shot in the same incident: a 17-year-old boy and a 15-year-old girl. Both teens suffered graze wounds to the neck and forehead, respectively, and were taken to area hospitals, police said.

In the first fatal shooting of the weekend, a 34-year-old man was killed while sitting on the front porch of a home in the Wicker Park neighborhood. The incident happened at about 1:45 a.m. Saturday in the 1700 block of West Pierce, police said.

The man was struck in the chest and shoulder and taken to John H. Stroger, Jr. Hospital, where he was pronounced dead.

The second fatal shooting of the weekend happened shortly later.

A 20-year-old man was found unresponsive with multiple gunshot wounds at about 2:10 a.m. Saturday in the 1000 block of West 14th Place on the Near West Side, police said.

The man was taken to John H. Stroger, Jr. Hospital, where he was pronounced dead.

Another man in his 20s was found dead with a gunshot wound to his head Saturday afternoon.

The man, 24, was found at about 12:45 p.m. in the 0-100 block of North Laramie in the Austin neighborhood, police said. He was taken to Mount Sinai Hospital, where he was later pronounced dead.

About 11 hours later, a man between 20 and 30 years old was found dead with a gunshot wound to his face in an alley in the 4700 block of North Albany in the Albany Park neighborhood, according to police.

Early Sunday morning at about 12:25 a.m., a 32-year-old man and another man, whose age was not known, were standing outside in the South Shore neighborhood when someone fired shots at them. The incident happened in the 7900 block of South East End Avenue.

The 32-year-old was shot in the neck and transported to Jackson Park Hospital, where he was pronounced dead. The other man was shot in the buttocks. He took himself to the same hospital, where he was in stable condition, police said.

In another fatal shooting incident early Sunday, a 29-year-old woman and two men, ages 25 and 39, were shot at a West Englewood house party by a group of people who were denied entry, police said. The incident happened at about 12:45 a.m. in the 6100 block of Honore.

The woman was shot in the chest and leg and taken to Holy Cross Hospital, where she was pronounced dead.

The younger man was shot in the arm and taken to Holy Cross Hospital in stable condition. The 39-year-old man was shot in the chest and transported to John H. Stroger, Jr. Hospital in serious condition.

Three others, including a 15-year-old boy, were killed in shootings late Sunday afternoon and evening.

A 35-year-old man was shot in the stomach in a drive-by shooting at about 3:20 p.m. Sunday in the 3200 block of West Maypole in th East Garfield Park neighborhood. He was pronounced dead at Mount Sinai Hospital.

A 28-year-old man was shot in the head and shoulder at about 4 p.m. Sunday in the 3300 block of West Division in the Humboldt Park neighborhood. He was later pronounced dead at Mount Sinai Hospital, police said.

A 15-year-old boy was shot and killed and a 14-year-old boy was wounded in a shooting around 8:15 p.m. in the 4400 block of South Cottage Grove. The boys were standing outside when shots were fired from someone in a light-colored sedan, police said.

The 15-year-old boy was found unresponsive in an alley and pronounced dead and the 14-year-old was taken to Comer Children's Hospital in stable condition with a gunshot wound to the foot.

Three others were killed on Memorial Day.

A man was shot and killed Monday afternoon in the Northwest Side Irving Park neighborhood. The shooting happened about 2:30 p.m. in the 4100 block of North Hamlin, police said. The 29-year-old victim was sitting passenger in a vehicle when another vehicle pulled up, and someone inside got out and fired shots, police said.

A 19-year-old man was killed in a shooting less than two blocks south of the Chicago Police Department’s Bronzeville neighborhood headquarters Monday evening. About 5:25 p.m., the man was shot in the back in the 0-100 block of East 36th Place, police said. He was taken to Stroger Hospital in critical condition and was later pronounced dead, police said.

Just before 8 p.m. Monday, a 17-year-old boy was fatally shot in the back and leg in the 4900 block of West Erie Street. Officers patroling the area heard gunshots and found the victim unresponsive in the street, according to authorities. Police said the teen was transported to Mount Sinai Hospital in serious condition and was later pronounced dead.

At least 36 others were injured in shootings across Chicago from Friday afternoon to Tuesday morning: