PHILADELPHIA (CBS) —  City police are investigating after three teens were stabbed on Monday afternoon following a fight at a pizza shop.

It happened around 4 p.m. at Castello’s Pizza located on the 6700 block Rising Sun Avenue in the Lawndale section of the city.

According to city police, the stabbing stemmed from a large fight between two gangs.

Police confirm three males were stabbed, including a 15-year-old, 18-year-old and a 17-year-old.

All three were transported to area hospitals after they flagged down a passerby.

Authorities say all three victims were stabbed in the lower back and are currently listed in stable condition.

No arrests have been made.

Anyone with any information is asked to call police at 215-686-TIPS.