Do not use flammable liquids as a few demonstrations call for.

A police official said flammable liquid had been found in the apartment.

The floor of the hidden chamber was two inches deep in flammable liquid.

"They are suspicious," he said, adding that a flammable liquid may have been involved.

"We've poured out every flammable liquid we could find, just as you told us to," he said.

It is a clear flammable liquid with a sweet smell.

It is a highly flammable and volatile liquid at room temperature.

As well, bottles of flammable liquid are found at two different housing development sites in the area.

No evidence was found that the fire had been intentionally set or helped along by a flammable liquid, he said.

Investigators said the fire, which quickly spread, appeared to have been started on the fifth floor with a flammable liquid.