Narrative:

Approximately 45 minutes prior to landing in ZZZ; 2 flight attendants working in first class talking to (what we thought was a regular passenger) turns out to be an fam. This is hours into the flight. First flight attendant called flight deck for verification. Flight deck was also unaware fams on board.

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Original NASA ASRS Text

Title: An air carrier Flight Attendant reported becoming aware of the presence of a Federal Air Marshal four hours into a transcontinental flight. The flight crew was also unaware of the Marshal's presence.

Narrative: Approximately 45 minutes prior to landing in ZZZ; 2 flight attendants working in first class talking to (what we thought was a regular passenger) turns out to be an FAM. This is hours into the flight. First Flight Attendant called flight deck for verification. Flight deck was also unaware FAMs on board.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.