Ms. Leung, who was arrested this month, is now the focus of an espionage investigation.

Those included adultery and keeping pornography on his government computer, issues that prosecutors said came to their attention in the espionage investigation.

Bob, an espionage investigation in our office - it could ruin things.

In general, such restrictions have been applied only to covert operations and ongoing espionage investigations, Congressional officials say.

Based on the above letter, the FBI initiated an espionage investigation.

Virtually everyone involved in this complicated espionage investigation has some motive to twist the facts.

Bob, an espionage investigation in our office-it could ruin things.

The press and the public were unaware that a major espionage investigation was under way at the State Department.

Nor was anyone charged as a result of the espionage investigation.

But their meandering espionage investigation had been short on resources and long on missed opportunities.