A federal judge has issued a temporary restraining order preventing Seattle City Light from disclosing the location of FBI cameras and other surveillance equipment hidden on some of the city's utility poles.

U.S. District Judge Richard Jones said in a written order Monday that he reviewed classified material before issuing the order, finding that the bureau could be "irreparably injured" if the information is released. Turning over the information could damage national security or "harm important federal law enforcement operational interests as well as the personal privacy of innocent third parties."

Federal prosecutors filed a complaint Monday in U.S. District Court asking that City Light be barred from turning over the information in response to a state public- disclosure request filed by Phil Mocek, a founding member of the Center for Open Policing, which has sued a number of public agencies over access to information.