7 people were shot, 3 fatally, over less than 6 hours in Philadelphia on Wednesday

Police said the suspect shot the victim immediately after both of them got off of the bus.

On average the data shows at least four people have died in mass killings once every six and 1/2 days this year. The numbers exclude perpetrator deaths.

Two teenagers, including a 14-year-old, were among four people killed in separate shootings on Saturday night in Philadelphia.