NATIONAL BRIEFING / GUANTANAMO BAY

The Justice Department is investigating whether detainees at Guantanamo Bay, Cuba, charged with roles in the Sept. 11 attacks were improperly given photos of CIA officers or contractors, said a person familiar with the investigation.

Investigators are trying to determine if lawyers defending the detainees divulged classified information or compromised covert CIA officers, according to the source, who was not authorized to discuss the investigation and spoke on condition of anonymity.

It is a violation of federal law to identify CIA covert personnel, and a violation of military commission rules to disclose classified information. The investigation was first reported by the Washington Post.