“NSA.gov was not accessible for several hours tonight because of an internal error that occurred during a scheduled update,” the NSA said in an emailed statement to ABC News. “The issue will be resolved this evening. Claims that the outage was caused by a distributed denial of service [DDoS] attack are not true.”
At least one group claimed responsibility for bringing down the NSA's website, according to ABC News. NSA.gov appeared to be up and running Saturday.