An investigation, he said, determined that the shell was not live.

He said a continuing investigation would determine "how and why this happened."

An investigation later determined that one of the engineers had run through a stop signal.

The investigation has not yet determined what was used to set the fires, officials said.

Only further investigation will determine if the association is a random occurrence or not, he says.

He said an investigation would determine whether the company was also culpable.

The investigation determined that weather had no role in this accident.

But the investigation has not yet determined whether the officer had failed to take any action.

But he added that the investigation had not determined a motive.

The investigation will determine the responsibility of the company, but I think we can already draw one conclusion.