Ty Gibbs' No. 54 Joe Gibbs Racing Toyota briefly caught air after an on-track incident with Spire Motorsports' Justin Haley.
Jet Rescue Air Ambulance said it was unlikely anyone on board survived the Friday crash. Nineteen people on the ground were injured, Philadelphia Mayor Cherelle Parker said.
Six people aboard a medical transport plane, along with one person on the ground, died in the fiery crash near a busy mall.