here is a diagram of the runway. note the over runs on both ends.
http://155.178.201.160/d-tpp/1406/00626AD.PDF
a thought struck me that perhaps the pilots took off from an intersection by mistake and didn't have sufficient runway for takeoff.
just a thought mind you.
doesn't it remind you a bit of the lexington, kentucky crash of the RJ, taking off on the wrong runway