1.   It is not known what prompted these interviews and the department would not comment on whether there was any inquiry.

2.   It is not publicly known what prompted the interrogations, in which the two told of knowing bin Laden, officials said.

3.   It was not until his sophomore year at Princeton, prompted by he knows not what, that Foer asked his mother about the story.

4.   It was not immediately known what prompted the Israeli air raid, the first on the Bekaa Valley region in more than a year.

5.   It was not immediately known what prompted the bombardment.

6.   It was not immediately known what prompted the situation.

7.   It was not known what prompted the sides to meet after all.

8.   Stockholm police spokesman Claes Cassel said it was not immediately known what prompted the occupiers to end their action.

9.   It was not known what prompted the two incidents.