A 19-year-old Philadelphia man was struck and killed and two others were injured early Thanksgiving morning in a hit-and-run on Interstate 95 in Harford County.Maryland State Police said troopers were called shortly before 2:15 a.m. to the southbound lanes of I-95 in Aberdeen.Police said the pedestrians were on the shoulder putting gas into a vehicle when a white sedan with tinted windows veered onto the shoulder and struck them.Guiermo Che, 19, of Philadelphia, died at the scene. Two others were taken to the hospital.Investigators said they believe the vehicle could be a white 2013-2017 Audi A5 or S5. It was last seen exiting I-95 south at exit 85. The vehicle may have damage to the right front bumper, headlight and fog light. Anyone with information is asked to call police at 410-537-1150.