Here is an interesting account by someone who was on this flight. I love the cute Singaporean accent.
A couple of interesting points:
1. She states the aircraft stopped at the terminal as per normal and all passengers disembarked, went through immigration, and proceeded to baggage reclaim. This seems to contradict media reports stating the aircraft was immediately taken to an isolated part of the airport and passengers kept on board.
2. She claims several passengers had already retrieved their bags from the carousel and left the area before security personnel stopped others from picking up their bags. Everyone else then had to wait hours while bags were screened. So what about the first passengers who got their bags? Were they actually on the same flight? If so, I see a problem.