An inquiry has begun to make sure that it doesn't happen again.

The inquiry began about five years ago, but in recent months has begun to focus on the major companies, the executives and officials said.

His office has refused to say when the new inquiry would begin.

He declined to identify the region or say when the inquiry began.

I took notes of your remarks when this inquiry began.

The officials asked not to be identified because the inquiry was just beginning.

The reports disclosed, among other things, that the inquiry began only recently.

He said the inquiry began about two months ago, but would not say what set it off.

The inquiry began in January 1997 and sat for 203 days, hearing evidence from more than 650 people.

At the beginning of September 2012, the public inquiry into his death began, seven years after the incident.