spy ring
spy network

In the past few weeks, I've learned about this spy ring.

More news about the spy ring must be forced out.

Previously, American officials have said the spy ring had been in business for at least a decade.

That's how I happened to know a lot about the spy ring.

Not quite tracking an international spy ring, but then, there's research to do everywhere.

This was the night when the spy ring had plans concerning a certain member of its own circle.

West German officials say it will be months before they can make a full assessment of the damage done by the spy ring.

None of the accounts mentioned him by name, his part in the spy ring seemed to be well covered.

I think it is indeed time to shut down this spy ring.

Nor is there doubt that he was a member of an atomic spy ring.