WASHINGTON (AP) - A federal judge is apologizing for an 18-month delay in unsealing documents in a case involving an alleged leak of classified information to a reporter. The documents include two warrants for the email accounts of Stephen Kim, a State Department adviser who faces charges of leaking secret information about North Korea to Fox News reporter James Rosen. The warrants, which had originally been ordered unsealed in November 2011, will be unsealed on Wednesday. Judge Royce Lamberth said errors by court staff caused the delay. It was revealed this week that during the Kim investigation, an FBI agent obtained a search warrant for some of Rosen's private emails and said there was probable cause to believe the reporter broke the law. Rosen wasn't charged.