WASHINGTON (AP) The National Security Agency says its website nsa.gov was inaccessible for several hours during a scheduled update.
The agency says an internal error in the system caused the problem.
There had been speculation on the Internet that the online site had been hit with a denial-of-service attack, but the agency said that was not true.
A denial-of-service attack is an attempt by outsiders to make a network unavailable to its intended users.
The NSA said the problem would be resolved Friday night.
This story has been automatically published from the Associated Press wire which uses US spellings