But it said the investigation had raised issues that needed to be addressed.

The investigation of the crime raised many questions from the media.

The criminal investigations have raised the stakes for tobacco companies.

In fact, scientists do more than ask, but their investigations raise still more questions.

Apple's statement said the financial investigation "raised serious concerns" about the activities of two other former Apple officers, but did not name them.

His investigation has raised questions about abuse of power.

"We think that's shortsighted because investigations raise a lot of money for the city and the state."

He said the investigation had raised "questions about conflict of interest and possible self-dealing."

Instead, scientists said, the investigation raised questions about what sort of assurances research like this can really provide.

The investigation raised the possibility that the results of the referendum could be called into question.