Former CIA intelligence officer John Kiriakou has been sentenced to 2 1/2 years in prison for leaking the name of a covert officer's name to a reporter.

The 48-year-old Arlington man pleaded guilty in October to violating the Intelligence Identities Protection Act, which no one had been convicted under in 27 years. He was sentenced Friday in federal court in Alexandria.

Kiriakou has admitted to leaking the name of a covert officer and to telling reporters that another agent was involved in an operation to capture al-Qaida terrorist Abu Zubaydah, according to prosecutors. The classified information that Kiriakou disclosed was transmitted to an investigator and lawyers involved in defending high-value detainees held at Guantanamo Bay.

Kiriakou was a CIA intelligence officer between 1990 and 2004. He worked in the agency's headquarters and had various classified overseas assignments.