This is reported by the local branch of the ABC TV channel.
It clarifies that propane tanks, torches and, presumably, dynamite bombs were found inside the truck.
A team of bomb technicians joined the investigation, which was launched due to the discovery of explosives.
At the moment, the police have no data on who owns the car.
Earlier in Philadelphia, a curfew was imposed until Thursday morning, October 29, amid riots following the murder of African American Walter Wallace by police.