It seems likely the investigation will focus on two possible causes.

If that was the case, the investigation may focus on a network of known terrorist groups.

He added that "the investigation should focus rather on what happened afterwards in the Bush administration."

The investigation has been under way for six months to a year, but focuses on events that occurred from 1981 to 1987, he said.

The investigation will focus on areas of social need which the student identifies as being prevalent in the local community.

The investigation focused on the foam strike from the very beginning.

In recent months, the investigation has mainly focused on the intelligence agency.

The investigation focused on corruption in a Government commodities agency.

The investigation focused on data from 1992 to 1996, when an elevator accident occurred an average of once every five days.

He said the investigation was focusing "on potential criminal activity that brought this plane down."