Although the work of the court is highly secretive, the authorities disclosed its use in two recent arrests.
Pakistani authorities disclosed few details about their investigation into the attack on Thursday.
Duke's president canceled the team's season and accepted the coach's resignation after the authorities disclosed the e-mail message.
The authorities did not disclose who owned the Subway shop.
The authority disclosed the problems this week when its board approved contracts for temporary repairs until permanent ones could be made.
The government's filing said the authorities "cannot disclose any national security information that may be at issue in this case."
Byelorussian authorities have never disclosed details of their investigation, but it apparently did not include an effort to talk to witnesses.
The authorities have not disclosed the identities of the first four men arrested in Los Angeles.
The authorities did not disclose where the men live, saying only that they were Albanian nationals.
The authorities disclosed little else about any evidence from the ashes of the school, which sat on a hill in this town of 800 people.