An unknown source indicated that he died 'early' in the fighting.

Again, let people decide if there is organized political activity here, not simply information we happened to get from unknown sources.

Lyrics appear to be in German and are from an unknown source.

Or perhaps he has obtained financing from some unknown source.

When a big beat from an unknown source kicked in, we returned to 2009.

But she was in peril from an unknown source and would know no more than they did.

It doesn't matter whether a letter is from her credit card company, an old friend or an unknown source.

In return, he received a substantial salary, which came from some unknown source.

Now, from an unknown source comes a voice of warning.

But now she knew it, as a fact, from that same unknown source, and the knowing frightened her.