- Four people fatally shot on Chicago train appeared to be sleeping, police say The Guardian US
- Four passengers killed after gunman opens fire in Chicago-area train car on Labor Day: police Fox News
- Charges expected after 4 killed in CTA Blue Line shooting, Forest Park mayor ABC7 Chicago
- CTA Blue Line shooting: Four dead after being shot while sleeping, mayor says WGN TV Chicago
- Investigators search for answers in Chicago train shooting that killed 4 passengers CNN