But we have not identified the source of the problem yet.

The paper did not identify by name the source of its information.

The agency did not identify the source of its report.

The soldiers could not identify the source of the fire.

The association did not identify its source or provide any further details.

They'd then identify its source, and be able to read the rest of his messages without further effort.

The network said it would not identify its original source.

It was a new one for me, so I stood again to attempt to identify its source.

The air was full of tension, though I couldn't identify its source.

However, he refused to identify the person or the source.