(Philadelphia Police Department) PHILADELPHIA - Philadelphia police are investigating a hit-and-run that left a 16-year-old boy injured in the city's Olney section.It happened at Mascher and Duncannon streets Friday around 3:30 p.m.According to police, a silver 4-door car was traveling south on Mascher Street, turning left to eastbound on Duncannon Avenue, when it struck the teen crossing the street with a green traffic signal.