It's not being reported in the media from what I have found, but the two crew members were treated at a hospital and released yesterday. So that is good news. I am hearing they believe the plant switcher for Tree House foods that was coupled to some rail cars rolled off of the Tree House spur on it's own, ran through the derail that is supposed to stop rolling cars and derailed on the ground. But with the cars behind it, it was so heavy that it pushed the locomotive (whose wheels were up the ground but was upright) into the right-of-way of the Norfolk Southern main line. The locomotive must have been unmanned when it rolled away. Then the intermodal train came along and struck the Tree House Food train.
There is a little speculation in there (train being unmanned) but ost of that comes from folks who work on the railroad and have heard from people who were on scene. Consider the source.
By the way, yesterday at 4:30 I went to the WACH Fox web site and they literally were blaming the derailment on a "fuel spill." All other local media were quoting officials on scene with the two train scenario. The fuel spill was caused by the derailment, of course, and not the other way around. I told WACH about the error and at around 7:30 they had finally updated the website hours after everyone ele had the news right.
They also misidentified the railroad company. It's norfolk Southern Railway, not Railroads. SMH