In one of the most violent weekends the city of Chicago has seen this year, at least 75 people were shot, 12 of whom were pronounced dead.

Starting around 3 p.m. Friday and ending at 6 a.m. Monday morning, 12 people were killed and 63 were wounded, according to the Chicago Tribune. The youngest victim was only 11 years old while the eldest was 62.  The violent attacks took place on the South and West sides of the city.

Six of the shootings from this weekend injured four or more people at a time. In a seven-hour period alone, at least 41 people were shot.

Due to the overwhelming number of shootings, Chicago Police Chief of Patrol Fred Waller held a news conference Sunday morning. During the briefing, he attributed the staggering number of shootings to gang members who feel unafraid to shoot into summer crowds at night.

"They take advantage of that opportunity and they shoot into a crowd, no matter who they hit,” Waller said.

Over the weekend, shooters targeted large groups at a block party, a funeral and other outdoor gatherings.

The largest attack wounded eight people in the South Side’s Gresham neighborhood around 12:40 a.m. Monday, including a 14-year-old girl and two 17-year-old girls.

Jahnae Patterson, 17, was killed in an attack that occurred around 2:30 a.m. on Sunday in the West Side’s Lawndale neighborhood. She was shot in the face and pronounced dead on scene, police said.

Kenny Ivory, 17, was also shot and killed while he rode his bike on the South Side on Sunday afternoon, police said. He was on his bike around 4:15 p.m. when he got into an argument with other males on bikes, police said. He was rushed to a hospital but died shortly after arriving.