CHICAGO (CBS) — A 19-year-old woman was shot and killed Monday night, and at least seven other people were wounded in various other shootings across the city.

Jaynisha Scheffer was walking with a group of people in the Chicago Lawn neighborhood, when a man on a bicycle rode up and fired several shots. Scheffer was shot in the back, and was taken to Advocate Christ Medical Center in Oak Lawn, where she was pronounced dead at 10:11 p.m.

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Seven other people were wounded in shootings in Chicago on Monday night, including two men who were shot while playing basketball in Englewood around 6:40 p.m.

The other shootings included:

• A 19-year-old man who was shot while standing with a group of people on a sidewalk in the 1000 block of West 89th Street, after a dark gray sedan pulled up and someone inside opened fire around 10:40 p.m. The victim was not seriously injured.
• A 21-year-old man and a 16-year-old girl who were walking on a sidewalk in the 6100 block of South Throop Street around 10:30 p.m., when a dark-colored van drove past and someone inside opened fire. The man was taken to John H. Stroger Jr. Hospital of Cook County in critical condition. The girl was not seriously injured.
• A 29-year-old man who was shot in the foot in West Garfield Park around 10 p.m. He was taken to Mount Sinai Hospital in good condition.
• A 22-year-old man who was wounded in a possible drive-by shooting around 9 p.m. in the 800 block of East 74th Street. He was not seriously injured.

Monday night’s shootings came on the heels of the most violent weekend in Chicago so far this year, in terms of shootings. At least 13 people were killed and 58 others wounded from Thursday afternoon to early Monday morning.

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Police Supt. Garry McCarthy and Mayor Rahm Emanuel called the level of violence over holiday weekend “unacceptable,” but they also said it’s not just up to the police to reduce violent crime. McCarthy, as he has done several times, called for stricter gun laws in Illinois to get more firearms off the streets.

Emanuel, who attended a vigil in the West Pullman neighborhood on Monday, said he’s still struggling to understand what made the July 4th weekend the most violent of the year to date.

“A lot of people will say ‘Where were the police, what are the police doing?’ and that’s a fair question, but not the only question. Where are the parents? Where is the community? Where are the gun laws? Where are the national leaders?” Emanuel said.

While calling on the community for help, the mayor did promise to take a closer look to see what police could have done better.

In addition to the other shootings, another five people were shot by police after allegedly pointing guns at officers over the holiday weekend. Two teenagers died of their wounds in the police-involved shootings.

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