Looks like the remains of at least one, more likely two Brandt hirail trucks were the power for the rail train. This wouldn't be unexpected because it has become common practice to avoid using conventional work trains presumably due to labor and loco costs.

Unfortunately one Herzog employee died and another injured.

There seems to have been a rash of train collisions of late where movement at restricted speed (or similar) was required - something PTC isn't able to prevent.

Will the next knee jerk reaction in the name of "safety" be to prohibit flagging a block?