statement released no aircraft involved, they think it was an accident, though a major one. Guess they wont know more until the fire is under control, at the moment 100+ fire crews are trying to stop the rest of the site/oil depots from going up, they havent started to tackle the blaze
article says 20 storage tanks each holding 3 million gallons went up...poof
http://news.bbc.co.uk/1/hi/uk/4517962.stm