3 juveniles injured on SEPTA bus following argument with suspected shooter

SEPTA bus shooting: Search continues after 4 injured
Philly police are looking for a man they said opened fire in a SEPTA bus injuring four people, including three teens. Here's what we know.
NORTH PHILADELPHIA - Three teens were riding a SEPTA bus and became involved in an argument with a man, who police say fired a gun at them.
What we know:
Officials with SEPTA said a group of juveniles were on a Route 15 bus Saturday evening, a little after 6:15, near 33rd and Girard Avenue.
An argument broke out between the juveniles and a man on the bus. That person then fired a gun at the group, and fled.
Officers arrived to find four gunshot victims: a 14-year-old boy, two 16-year-old boys and a 39-year-old woman.
The three juvenile victims were taken to a local hospital in stable condition, while the woman refused further medical attention after being treated at the scene.
Police believe the suspect who fired the shots is a man in his 40s.
What we don't know:
Chief of the Intelligence Unit Danielle Burkavage said on Monday that investigators are confident they will place the suspect in custody soon.
Anyone with any information is urged to contact the Philadelphia Police tipline at 215-686-TIPS (8477).