A city employee caught in gang crossfire was among five people killed and 40 more wounded in shootings across Chicago between Friday afternoon and Monday morning.

Chicago Police issued a statement Sunday in the middle of one of the first consistently warm weekends of the spring, as intensified city gun violence typically accompanies rising temperatures.

“As we look toward the summer months, Superintendent Johnson has made it very clear that the violence will not be tolerated – period,” the statement said. “The cause of the violence traces back decades, and everyone has a role to play in fixing it – police working with parents, judges, residents, clergy, community leaders, and others. Put simply, we need more values, fewer guns and stronger sentences against violence offenders.”

The first attack of the weekend happened about 4 p.m. Friday in the Bronzeville neighborhood, where Yvonne Nelson, an operator for the city’s 311 service, was walking out of a Starbucks near 35th Street and State when shots rang out, authorities said.

A 19-year-old man flagged down officers on the block saying he had been shot, and they found the 49-year-old Nelson on a sidewalk nearby with a gunshot wound to the chest, according to police and the Cook County medical examiner’s office.

Nelson, of the 4900 block of South Vincennes, was taken to Stroger Hospital, where she died at 4:33 p.m., authorities said. She had worked for the city since 2002, according to the city’s Office of Emergency Management and Communications.

The man — who police said was a documented gang member and the intended target of the shooting — was taken to Northwestern Memorial Hospital with gunshot wounds to the hand and buttocks. His condition stabilized, police said.

The shooting happened just minutes after a press conference touting a sweep of arrests in a gang investigation at Chicago Police headquarters, which is two blocks east of the crime scene.

The most recent homicide happened Sunday afternoon in the Park Manor neighborhood on the South Side.

Gregory Carr, 20, was walking down the street in the 6900 block of South Wabash about 4 p.m. when a dark SUV pulled up and someone inside it opened fire, hitting the man in upper body, authorities said.

Carr, who lived in the 0 – 100 block of East 69th Street, was shot in the upper body and taken to Stroger Hospital, where he was pronounced dead at 4:45 p.m., authorities said.

Another man was fatally shot Saturday night in the Englewood neighborhood on the South Side.

A 26-year-old man was walking in the 7000 block of South Carpenter about 7:40 p.m. when two gunmen walked out of a gangway and opened fire, shooting him in the abdomen, police said.

He was taken to Advocate Christ Medical Center in Oak Lawn, where he later died, police said. His name has not been released.

Earlier Saturday, two men were gunned down within hours of each other on the South Side.

About 3 a.m., officers responding to a call of a person shot found 35-year-old Michael Wickliffe with multiple gunshot wounds in a yard in the 7900 block of South Ellis in the Chatham neighborhood.

Wickliffe, of the 15700 block of Vine Avenue in Harvey, was taken to Jackson Park Hospital, where he was pronounced dead at 3:22 a.m., authorities said.

About 12:20 a.m., 30-year-old Semial Sigle was in the first block of West Garfield in the Washington Park neighborhood when he got into a fight with two other people and one of them shot him in the chest.

Sigle, who lived in the 1800 block of South Wolcott, was taken to Stroger Hospital, where he was pronounced dead at 12:45 a.m., authorities said.

The latest wave of violence saw seven people wounded in less than five hours overnight Monday.

About 2:35 a.m., a 35-year-old man was shot in the South Shore neighborhood. He was standing on a front porch in the 7800 block of South Kingston when someone in a vehicle nearby fired shots in his direction, police said. The man was shot in the left leg and was taken to Northwestern Memorial Hospital, where his condition was stabilized.

About 30 minutes earlier, a 50-year-old woman was shot in the Rogers Park neighborhood on the North Side. She woman told investigators she was walking in the 6400 block of North Magnolia about 2 a.m. when she heard gunfire and was shot in the left leg, police said. More than two hours later, she walked into Advocate Illinois Masonic Medical Center, where her condition was stabilized.

Earlier Monday, a man and woman were injured in a drive-by shooting in the Heart of Chicago neighborhood on the Lower West Side. They were standing outside about 1:30 a.m. in the 2300 block of South Levitt when a red minivan drove by and someone inside fired shots, police said. The 30-year-old woman suffered a gunshot wound to the left leg and the 20-year-old man was shot in the left foot. Both were taken to Stroger Hospital, where their conditions were stabilized, police said.

About 11:25 p.m. Sunday, a man was wounded in a North Lawndale neighborhood shooting on the Southwest Side. The 36-year-old was standing on the sidewalk in the 1600 block of South Komensky when another male walked up and fired shots, striking the man in the right knee, police said. He took himself to Mount Sinai Hospital, where his condition was stabilized.

At 10:43 p.m., a 24-year-old woman was sitting in the front seat of a vehicle in West Englewood’s 6900 block of South Winchester, when two males walked up and opened fire, police said. She was shot in the right thigh and was driven to Holy Cross Hospital. The woman was later transferred to Mount Sinai Hospital, where her condition was stabilized.

Less than an hour earlier, an 18-year-old man was shot and critically wounded in the Marquette Park neighborhood on the Southwest Side. He was outside with a group of people about 9:50 p.m. in the 7100 block of South Washtenaw when someone in a car opened fire, police said. The man was shot in the abdomen and taken in critical condition to Christ Medical Center.

At least 32 more people were wounded in other shootings between 7 p.m. Friday and 9:30 p.m. Sunday.