U.S. Army officials in Alaska are withholding details behind the arrest of a 22-year-old soldier suspected of espionage, but stress there is no connection with the case involving an Army analyst suspected of disclosing secret intelligence to WikiLeaks.

Spc. William Colton Millay of Owensboro, Ky., was arrested Friday at a barracks room at Joint Base Elmendorf-Richardson. He is expected to be charged through the military justice system later this week.

Millay is being held at the Anchorage Correctional Facility.

Army Lt. Col. Bill Coppernoll says Millay's arrest stems from an ongoing investigation conducted by the Army and FBI.

Coppernoll says few details are being released now, but adds that unlike the WikiLeaks case targeting Army analyst Bradley Manning, allegations do "not involve the transfer of data on computer networks."