The National Transportation Safety Board (NTSB) has issued a brief detailing what investigators found after a fire and explosions damaged two barges that were docked in Mobile, Ala., on April 24, 2013, in order for the barges' tanks to be cleaned. Flammable vapors flowed from the tank hatches into the engine room of the towing vessel and ignited, the brief says, and the fire spread to the barges alongside. Three people were seriously burned, and damage total to the towing vessel and the barges was estimated at $5.7 million, according to the report.

Read entire article: https://www.ntsb.gov/doclib/reports/2014/MAB1413.pdf