CNN has been running the story on the Telly as well with footage of the stern section of the ship jutting out of the water. Apparently, it happened because of a fire that started on the deck of the ship. I'm sure there's more to the story then that, but we'll have to hope that the survivors saw what got it going and that they can offer testimony or statements in the investigation that's going to follow.
I would hope so as well. CNN has an updated version of their earlier story HERE, including accounts of the rescue operations. It notes that the ship was carrying " 3.5 million gallons of ethanol, about 200,000 gallons of fuel oil and 53,000 gallons of diesel fuel..." A decidedly volitile mix. It shouldn't come as a surprise that these ships as well as LNG tankers are given a very wide and respectful berth whenever possible by other ships.