According to police, 11 people have been shot since early Saturday morning.
Officers have responded to eight shootings since 9:30 p.m. Saturday.
The most recent shooting happened just after 2:30 p.m. Sunday in Tioga Nicetown.
A 26-year-old man was injured and taken to the hospital in stable condition.
Police say the shooting happened during an attempted robbery. Four suspects ran from the scene.
Anyone with any information is asked to call police at 215-686-TIPS.