The Chicago Tribune reports:

At least 36 people were shot in Chicago, four of them fatally, in as many hours over the weekend, with more than half of the shootings occurring over a half-day period stretching into early Sunday.

Officers responded to at least 27 incidents, starting at 3:30 p.m. Friday in the West Woodlawn neighborhood on the South Side involving an attack that left a 17-year-old girl dead and two other people wounded, police said. There were also fatal shootings in the South Shore neighborhood Friday night and the Washington Park neighborhood early Sunday, both on the South Side.

"While the city continues to see reductions in crime and violence, there's obviously much more to be done, and we continue to be challenged by lax state and federal gun laws," Chicago police spokesman Adam Collins tells the paper.