PHILADELPHIA (AP) — Police are investigating a shooting that injured four people in northeast Philadelphia.

Investigators say at least a dozen shots were fired Thursday night. Police say two 17-year-old boys were both struck in the hip. Authorities say a 21-year-old was struck in the arm and a 23-year-old man was hit in the legs and lower back.

The victims were all taken to area hospitals where three are listed in stable condition. Police say the 23-year-old's man condition is unknown.

No arrests have been made. An investigation continues.