PHILADELPHIA (WPVI) -- An investigation is underway into what caused two CSX train cars to derail in Center City early Monday morning.
It happened near the 2400 block of Chestnut Street at about midnight.
Crews have been able to upright the cars.
There were hazmat materials in the affected cars.
Luckily, there were no reports of any injuries.
Investigation underway into train car derailment in Center City