(Chicago)  A 15-year-old boy shot dead during a robbery attempt was among three people killed and at least 29 others wounded in shootings across the city this weekend.

Demario Bailey, of the 7500 block of South Wabash, was walking with his twin brother in the 0-100 block of West 63rd Street about 12:40 p.m. Saturday when four people walked up and demanded his jacket, according to the boy’s family, Chicago Police and the Cook County medical examiner’s office.

Bailey was pronounced dead at the scene, the medical examiner’s office said.

On Sunday, Carlos Johnson, 17, was charged with fatally shooting Bailey in the chest, officials said.

Johnson, of the 6100 block of South Martin Luther King Drive was charged as an adult with murder, robbery and attempted robbery, police said. Johnson, who was also charged with another robbery that occurred shortly before Demario was killed, is due to appear in court Monday.

On Friday evening, a man was shot to death in the Humboldt Park neighborhood on the West Side.

About 7 p.m., 28-year-old Rolando Leon was inside a vehicle in the 1300 block of North Springfield when at least one person walked up and fired shots, authorities said.

He was shot in the head and pronounced dead at the scene at 7:23 p.m., authorities said. Leon lived in the 1200 block of North Springfield.

A child was also in the vehicle at the time of the shooting, but was not injured, police said.

About two hours before that, a man was shot to death in a drive-by attack in the Roseland neighborhood on the Far South Side.

Tyrece L. Stornes, 27, was outside his home in the 10400 block of South State about 5 p.m. when someone fired shots at him from a passing vehicle, authorities said.

He was shot in the chest and side and pronounced dead at the scene, authorities said.

The most recent nonfatal shooting happened Sunday night in the Gresham neighborhood.

The man, 33, was standing outside about 11:15 p.m. in the 1600 block of West 81st Street when someone pulled up in a dark-colored SUV, got out of the vehicle and an argument ensued, police said.

That person then pulled out a handgun and shot the man in the buttocks, police said. The shooter then got back in the SUV, which sped away.

The man was taken to Little Company of Mary Hospital in Evergreen Park, where his condition stabilized, police said.

At least 28 other people have been wounded in 21 separate shootings across the city since 10 p.m. Friday.

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