NavList:

How sad.  I feel for all on board and their families.  I’ve found with maritime and aviation incidents that the wisest policy is to make a mental assessment of what might have happened but then stay tight-lipped until the official report is published.  There are so many possibilities that there’s little point in further speculation.  One comment I will make over videos of such incidents is that I’m constantly amazed by the number of people who’ll stand recording with their smart phone when anyone with any sense would be running like mad in the opposite direction.  DaveP