Prosecutors have refused to comment, citing restrictions against publicly discussing cases involving state secrets.

As evidence, they cite restrictions on travel, fields of study, choice of profession, access to the courts, and political speech.

He cites technical restrictions as the reason for his cancellation.

The person declined to speak for attribution, citing regulatory restrictions on promoting hedge fund results.

Officials at the firm declined to comment, citing regulatory restrictions on speaking about fund-raising.

Citing legal restrictions, officials would not disclose whether that represented the lowest bid.

Much of her work during the war was classified, and she has generally refused to speak about those matters, citing legal restrictions.

Neither company would comment today, citing regulatory restrictions.

A spokeswoman for the exchange described the deal as a "strategic" step and declined to comment further, citing British regulatory restrictions.

The associations are also fighting the expansion of the private Children's School, citing zoning restrictions on commercial properties.