Chopper 6 was over the scene in the eastbound lanes of the highway just past Montgomery Avenue in Fairmount Park.
State police say they were called out for a vehicle investigation around 2 p.m. and noticed what appeared to be a grenade.
Upon further investigation, it was determined that it was not real and possibly a toy.
The scene was cleared and the road was reopened a little after 3 p.m.
Further details on the incident were not immediately released.