Once we were on the ground we had an engine running they could not stop and fuel leaking onto the runway. At that point it's really the fire crews have a far better visual on what they have to deal with. At all times we were ready to evacuate, but bear in mind with an engine running it would have been out of one side of the aircraft. Better to keep us seated, let the situation be dealt with, always ready to evacuate if needed.
Sounds like there was a breach in the fuel tank and one of the pictures seem to indicate fuel coming from the aft hole in the wing top.