Four children were shot and wounded on a SEPTA bus after an altercation Saturday evening, according to transit officials. The Route 15 bus was at 33rd and Girard Streets in Fairmount Park when an adult fired at the children and fled the bus at around 6:20 p.m., according to John Golden, a senior press officer at SEPTA.

Law enforcement officers canvassed a SEPTA bus that was parked in the middle of Girard Avenue in Fairmount Park Saturday evening. It's unclear at this time if anyone was injured in the incident.

Four people, including three teenage boys, were shot while riding on a SEPTA bus in Philadelphia. Allegedly, an unidentified man confronted the boys on the back of the bus, only to pull out a gun and shoot at them.