The lack of source material does not help when investigating such issues.

The committees are called to investigate issues of public interest.

We have not investigated the issue and cannot offer a judgment on it.

Herbert seems to have done nothing about investigating the issue.

Insurance departments in several other states are investigating the issue.

It's now being reported that Microsoft is investigating the issue.

It prompts us again to investigate the issue of why bad things sometimes happen to good people.

We will investigate the issue and provide you with a detailed reply.

At least eight studies into eye movement in music reading have investigated analogous issues.

They also must investigate any protests or issues in these elections.