Updated 07/08/14 – 6:48 a.m.

CHICAGO (CBS) — At least 13 people were killed and 58 others were wounded in shootings across Chicago over the long holiday weekend, from Thursday evening through early Monday morning.

There were also six police-involved shootings, two of them involving teens who were killed.

In the most recent fatal shooting, 24-year-old Joey Henderson was shot in the back, right arm, chest, and eye while he was standing on the 8400 block of South Buffalo Avenue around 2:30 a.m. Monday. Police believe the shooter approached him from a nearby gangway and opened fire. The victim was taken to Northwestern Memorial Hospital, where he was pronounced dead at 3:33 a.m.

Authorities have not yet released the man’s name.

In other fatal shootings:

• Cassius White, 19, was standing with a 16-year-old boy on a sidewalk in the Washington Heights neighborhood around 12:40 a.m. Monday, when someone in a gray sedan drove by and shot them in the 9600 block of South Sangamon Street. White was taken to Advocate Christ Medical Center in Oak Lawn, where he was pronounced dead shortly before 6 a.m. The 16-year-old boy was shot in the leg, and not seriously wounded.

• Tonya Gunn, 44, was at a barbecue around 12:30 a.m. Monday in the Morgan Park neighborhood, when someone shot her as she was leaning into a car in a parking lot near 109th and Throop. She was pronounced dead at the scene.

• William Allen, 25, was shot in the 3000 block of East 81st Street around 11:20 p.m. Sunday. He was taken to Northwestern Memorial Hospital, where he was pronounced dead Monday afternoon.

• Shiquille Salter, 23, was shot several times in the chest around 9 p.m. Sunday while he was standing on a corner in the 300 block of West 116th Street. He was taken to Advocate Christ Medical Center in Oak Lawn, where he was pronounced dead.

• Two men were sitting in a car in the 5200 block of West Lake Street Sunday evening, when someone walked up and opened fire. Donald Ray, 21, man was shot in the head, and pronounced dead at West Suburban Medical Center in Oak Park. The other man was not seriously injured.

• Kezon Lamb, 19, was sitting in a vehicle with a female in the 4400 block of North Malden Street about 12:20 a.m. when a gunman walked up and fired shots, authorities said. Lamb, of the 4100 block of West 127th Street in Alsip, was shot in the back and taken to Advocate Illinois Masonic Medical Center, where he was pronounced dead at 1:05 a.m., authorities said.

• Anthony Hobson, 25, was riding a bike in the 10400 block of South Normal Avenue about 11:35 p.m. Saturday night, when a silver sedan drove by and someone inside fired shots, authorities said. Hobson, of the 10500 block of South Normal Avenue, was shot in the head and shoulder and taken to Roseland Community Hospital, where he was pronounced dead at 12:07 a.m., authorities said. Police said he is a documented gang member.

• Shaquille Ross, 18, was found unresponsive in the street in the 6500 block of South Seeley Avenue about 4:30 p.m. with gunshot wounds to the upper torso and neck, according to police and the Cook County Medical Examiner’s office. Ross, of the 200 block of West 95th Street, was taken to Advocate Christ Medical Center in Oak Lawn, where he was pronounced dead at 8:09 p.m., authorities said. Police said he was a documented gang member.

• Deandre Brown, 23, was in the 8700 block of South Houston Avenue about 10:20 a.m. Saturday when he was shot in the leg and abdomen, authorities said. Brown, of the 9000 block of South Mackinaw Avenue, was taken to Northwestern Memorial Hospital, where he was pronounced dead at 11:38 a.m., the medical examiner’s office said.

• Joel Bentley, 30, was in a Walgreens parking lot on the southwest corner of West 63rd Street and South Austin Avenue just before 1 a.m. Saturday when he was shot in the abdomen, authorities said. Bentley, of the 5000 block of South Keating Avenue, was taken to Advocate Christ Medical Center in Oak Lawn, where he was pronounced dead at 5:46 a.m., the medical examiner’s office said.

• Two men were standing outside in the 2000 block of West 63rd Street when a black vehicle pulled up and someone inside opened fire, striking both of them, police said. Corey Hudson, 34, of the 6000 block of South Bell Avenue, was dead at the scene, the medical examiner’s office said. The other man, Robbert Cotton of the 9600 block of South Mozart Street in Evergreen Park, was taken to John H. Stroger Jr. Hospital of Cook County, police said. He was pronounced dead at 4:47 a.m. Sunday.

At least 56 other people were wounded in citywide shootings throughout the holiday weekend.

Mayor Rahm Emanuel and Police Supt. Garry McCarthy called the number of shootings over the weekend “unacceptable.”