The American statement followed a round of increasingly unbelivable explanations conflicting statements on the investigation from Pakistani authorities.

"It was just an accident caused by short-circuiting and nothing else," -- Information Minister Sheikh Rashid Ahmed

"We haven't found any evidence that would suggest that it was an act of sabotage. The evidence indicates the blast was caused by short-circuiting. At the moment we rule out the possibility of any act of terrorism." -- Brigadier Javed Cheema (Interior Ministry National Crisis Management Unit), to AFP

[Cause could have been an "air vacuum"] "If your room is virtually airtight, even if one electricity bulb bursts, it produces a big sound. These buildings are under high pressure so hence the bang was created." -- Brigadier Cheema (to BBC?)