(NBC CHICAGO) Violence continued to strike the Chicago area this weekend with at least 18 people shot in a little more than 12 hours overnight, bringing the number of people shot since Friday to 40.

Four people, including an 11-year-old girl at a sleepover with friends, have been killed, police said.

Sunday’s first homicide took place just after 2:30 a.m. when a gunman opened fire in a bar on Chicago’s Southwest Side.

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