Police say weekend shootings in Chicago have left at least 11 people dead and about 70 wounded.
The violence peaked early Sunday, including one shooting on the city's South Side that injured eight people.
Chicago's mayor, Rahm Emanuel, says one lesson from a wave of weekend violence is that people who live in neighborhoods where the shootings occurred have to be willing to name potential suspects.
Mayor Emanuel held a news conference with Police Superintendent Eddie Johnson Monday to address the violence. Police say at least 11 people were killed and about 70 were wounded over the weekend.
Emanuel says residents must be willing to "speak up" and help identify suspects. Johnson echoed that, saying there are often people who know who pulled the trigger but don't go to police.
Emanuel and Johnson say the weekend shootings were concentrated in just a few neighborhoods on Chicago's West and South Sides, in areas where street gangs are entrenched.
Johnson says the shootings "are not random" and are "fueled by gang conflicts."