1.   The evidence suggests arson as the cause of the fire.

2.   Although officials said it was started in several places simultaneously, suggesting arson, they have not ruled out a technical defect as the cause.

3.   Although officials said the fire was started in several places simultaneously, suggesting arson, they have not ruled out a technical defect as the cause.

4.   Although officials said the fire was started in several places simultaneously, suggesting arson, they have not ruled out a technical defect.