Philadelphia:

Update Per @UDPolice at the scene:two trains crashed head-on… two-three cars now off the track … pic.twitter.com/gXSXfDvxCP

— Bob Kelly (@bobkellytraffic) February 21, 2017

Septa update, total now up to six cars off the tracks and damaged, NTSB officials enroute. MFL does not have any cars to spare at this point pic.twitter.com/nT63Az4X6P

— Bob Kelly (@bobkellytraffic) February 21, 2017